After years, David and I were the only ________ left who were not married．

1. A.
   one
2. B.
   ones
3. C.
   those
4. D.
   these

You love Jay Chou's songs and you can sing some quite well. So you make a video of your performance and post it online for your friends to see. But what if this led to something beyond your wildest

imagination—a career in music?

Canadian teenager Justin Bieber, 16, has just had the magical experience: He posted homemade videos of his versions of songs by American singer Chris Brown online for his relatives. He received a phone call from Brown, telling him how much he liked his performance. His singing eventually earned him a fan base and a record contract. After releasing a popular record in November 2009, his album My world 2.0 came out last Tuesday.

Bieber sings ballads（民歌）and songs about puppy love. But is he just another gooey (甜腻的) teen idol? David Malitz, a columnist with the Washington Post, doesn't think so. “If we truly want the best forAmerican children, let us pause and give thanks for Justin Bieber，” he writes. “After years of humdrum bubblegum (乏味的摇滚舞曲) from Miley Cyrus and the Jonas Brothers, the 16­year­old has thrown a candy­coated wrench (扭转) into Disney's heartthrob (甜心) assembly line by giving young fans something worth screaming their lungs out for lovable pop songs.”

From a boy who grew up below the poverty line with his divorced mom to a star who caused near­riots (近乎失控) in shopping malls, even Bieber himself can't believe his overnight fame, although his kind of success is becoming more and more common in the Internet era.

Interested in hockey, the national sport of Canada, the boy once put up pictures of players on the walls of his bedroom. He dreamed of being a hockey star and used to practice signing his autograph. He doesn't need practice now. He signs autographs, if the girls can get close enough, as a music star.

1.What did Chris Brown think of Justin Bieber's singing?

A．He didn't like it.          B. He liked it very much.

C．He didn't say anything.     D．He supported Justin Bieber.

2.What can we learn from the fourth paragraph?

A．He had a happy family.

B．His family was very poor once.

C．His family was rich.

D．His family helped him a lot.

3.What's Justin Bieber's hobby?

A．Singing.          B．Hockey.       C．Signing.          D．Making records.

4.What's the best title of the passage?

A．Justin Bieber's overnight singing online.

B.Justin Bieber's common experience.

C．Justin Bieber's life.

D．Justin Bieber's records.

D
Is a recently discovered hormone the reason why folks who lose weight can’t keep it off?
Like millions of other fat people, at 530 inches high, more than 300 pounds, Carnie Wilson was not just fat. After trying all sort of diets that didn’t work, she has to go to the stomach – bypass surgery (胃部迂回手术), ie, have most of her stomach sewed up, only leaving tiny room to hold several tablespoonfuls at most. Result: she simply couldn’t eat the way she used to. In three years, Wilson is one third of her former weight.
Wilson’s experience is not all that unusual, and while doctors still aren’t exactly sure what is going on, a report in last week’s Journal of Medicine offers an explanation. The loss of appetite in bypass patients may be linked to a recently discovered hormone called ghrelin. Not only that, ghrelin may turn out to be one reason we feel hungry and it’s hare for didters to keep weight off.
Nowadays, researchers are careful to stress only what they know for sure. For the three conclusions, the leading Dr. David of the University of Washington says, “I feel very solid about two of them.” The first is that ghrelin levels in the bloodstream rise significantly before meals and drop afterward. The second conclusion is that ghrelin levels are higher on average in people who have lost weight from dieting.
Dr. David is less sure of the third conclusion, that bypass patients have only a quarter as much ghrelin as most people of normal weight. After all, ghrelin is produced by cells in the stomach. Years ago, leptin, a hormone was found as an appetite suppressant (食物抑制剂). But after years of trying, it had to be given up.
What doctors suspect is that both leptin and ghrelin are part of a complex system of brain and body chemicals that govern weight and appetite. That does not mena pharmaceutical (药物的) weight control is forever out of the question. “In the next ten years, we will be able to develop new drugs to help people lose weight healthily and effectively.”
47．What can we learn about ghrelin according to the passage?
A．After meals ghrelin levels are higher in the bloodstream.
B．People who have lost weight have less ghreilin in their body.
C．Without ghrelin, people are really difficult to lose weight.
D．Ghrelin is something produced by cells in the stomach.
48．What is Dr. David not sure?
A．pharmaceutical weight control is impossible.
       B．There is less ghrelin in the bypass patients.
C．new drugs will be developed in 10 years.
D．ghrelin levels are higher in people on diet.
49．In fact, people’s weight and appetite are controlled by        
A．ghrelin and leptin                      B．hormone and medicine
C．brain and body chemicals                  D．stomach and food
50．What can we infer from the passage?
A．People with a lower ghrelin level go hungry easily.
B．Doctors managed to use leption to control the appetite.
C．Doctors are optimistic about how to lose weight healthily.
D．The loss of appetite in bypass aptient is linked to leptin

Is a recently discovered hormone the reason why folks who lose weight can’t keep it off?

Like millions of other fat people, at 530 inches high, more than 300 pounds, Carnie Wilson was not just fat. After trying all sort of diets that didn’t work, she has to go to the stomach – bypass surgery （胃部迂回手术）, ie, have most of her stomach sewed up, only leaving tiny room to hold several tablespoonfuls at most. Result: she simply couldn’t eat the way she used to. In three years, Wilson is one third of her former weight.

Wilson’s experience is not all that unusual, and while doctors still aren’t exactly sure what is going on, a report in last week’s Journal of Medicine offers an explanation. The loss of appetite in bypass patients may be linked to a recently discovered hormone called ghrelin. Not only that, ghrelin may turn out to be one reason we feel hungry and it’s hare for didters to keep weight off.

Nowadays, researchers are careful to stress only what they know for sure. For the three conclusions, the leading Dr. David of the University of Washington says, “I feel very solid about two of them.” The first is that ghrelin levels in the bloodstream rise significantly before meals and drop afterward. The second conclusion is that ghrelin levels are higher on average in people who have lost weight from dieting.

Dr. David is less sure of the third conclusion, that bypass patients have only a quarter as much ghrelin as most people of normal weight. After all, ghrelin is produced by cells in the stomach. Years ago, leptin, a hormone was found as an appetite suppressant （食物抑制剂）. But after years of trying, it had to be given up.

What doctors suspect is that both leptin and ghrelin are part of a complex system of brain and body chemicals that govern weight and appetite. That does not mena pharmaceutical （药物的） weight control is forever out of the question. “In the next ten years, we will be able to develop new drugs to help people lose weight healthily and effectively.”

1．What can we learn about ghrelin according to the passage?

       A．After meals ghrelin levels are higher in the bloodstream.

       B．People who have lost weight have less ghreilin in their body.

       C．Without ghrelin, people are really difficult to lose weight.

       D．Ghrelin is something produced by cells in the stomach.

2．What is Dr. David not sure?

       A．pharmaceutical weight control is impossible.

       B．There is less ghrelin in the bypass patients.

       C．new drugs will be developed in 10 years.

       D．ghrelin levels are higher in people on diet.

3．In fact, people’s weight and appetite are controlled by         

       A．ghrelin and leptin                                 B．hormone and medicine

       C．brain and body chemicals                     D．stomach and food

4．What can we infer from the passage?

       A．People with a lower ghrelin level go hungry easily.

       B．Doctors managed to use leption to control the appetite.

       C．Doctors are optimistic about how to lose weight healthily.

       D．The loss of appetite in bypass aptient is linked to leptin

Is a recently discovered hormone the reason why folks who lose weight can’t keep it off?

Like millions of other fat people, at 530 inches high, more than 300 pounds, Carnie Wilson was not just fat. After trying all sort of diets that didn’t work, she has to go to the stomach – bypass surgery (胃部迂回手术), ie, have most of her stomach sewed up, only leaving tiny room to hold several tablespoonfuls at most. Result: she simply couldn’t eat the way she used to. In three years, Wilson is one third of her former weight.

Wilson’s experience is not all that unusual, and while doctors still aren’t exactly sure what is going on, a report in last week’s Journal of Medicine offers an explanation. The loss of appetite in bypass patients may be linked to a recently discovered hormone called ghrelin. Not only that, ghrelin may turn out to be one reason we feel hungry and it’s hare for didters to keep weight off.

Nowadays, researchers are careful to stress only what they know for sure. For the three conclusions, the leading Dr. David of the University of Washington says, “I feel very solid about two of them.” The first is that ghrelin levels in the bloodstream rise significantly before meals and drop afterward. The second conclusion is that ghrelin levels are higher on average in people who have lost weight from dieting.

Dr. David is less sure of the third conclusion, that bypass patients have only a quarter as much ghrelin as most people of normal weight. After all, ghrelin is produced by cells in the stomach. Years ago, leptin, a hormone was found as an appetite suppressant (食物抑制剂). But after years of trying, it had to be given up.

What doctors suspect is that both leptin and ghrelin are part of a complex system of brain and body chemicals that govern weight and appetite. That does not mena pharmaceutical (药物的) weight control is forever out of the question. “In the next ten years, we will be able to develop new drugs to help people lose weight healthily and effectively.”

47．What can we learn about ghrelin according to the passage?

         A．After meals ghrelin levels are higher in the bloodstream.

         B．People who have lost weight have less ghreilin in their body.

         C．Without ghrelin, people are really difficult to lose weight.

         D．Ghrelin is something produced by cells in the stomach.

48．What is Dr. David not sure?

         A．pharmaceutical weight control is impossible.

         B．There is less ghrelin in the bypass patients.

         C．new drugs will be developed in 10 years.

         D．ghrelin levels are higher in people on diet.

49．In fact, people’s weight and appetite are controlled by        

         A．ghrelin and leptin                B．hormone and medicine

         C．brain and body chemicals D．stomach and food

50．What can we infer from the passage?

         A．People with a lower ghrelin level go hungry easily.

         B．Doctors managed to use leption to control the appetite.

         C．Doctors are optimistic about how to lose weight healthily.

         D．The loss of appetite in bypass aptient is linked to leptin