Black holes _____ not be seen directly, so determining the number of them is a tough task.

A. can　　　　 B. should 　　　　　C. must　　　　 D. need

In 2008, the main candidates（候选人）for President each used this expression: “You can put lipstick（口红）on a pig, but it is still a pig.” This means that it is a waste of time to change something from ugly or unpleasant–looking to beautiful.

There are other expressions about improving a pig’s appearance, like this one: “A hog in a silk waistcoat is still a hog.” Hogs are similar to pigs, only bigger. Americans use many other expressions about pigs, hogs and female hogs called sows, like this one, “You cannot make a silk purse out of a sow’s ear.” This means you cannot create something valuable from something that has no value. Then there is the expression “Cast pearls before swine（猪）.” That means wasting something valuable on someone who will not be thankful or care about it.

Hogs, which are very large animals, take up a lot of space but people should not take up more than their share. If one of your children is taking up too much space sitting in front of the television, other children might say: “Do not hog the couch.” And a road hog is a driver who uses more than his share of the road. Such a driver increases dangers for other drivers.

Pig terms are also used in American politics. Farmers mark their pig’s ears to identify them. In politics, earmarks are money set aside for projects in a congressman’s home state.

In many areas, pigs provide ham, bacon and other pork products to eat. All Americans want to be able to bring home the bacon because they want to earn enough money to provide the necessities of life. Experts say this term was first used in the 1920s. But it is believed to come from the much older game of catching a greased（涂了油的）pig. This was a popular event at country fairs in which the winner was awarded the pig.

1. The author writes this passage mainly to _________.

A. express his support for the Presidential Election

B. introduce some expressions used in Americans’ daily life

C. criticize the bad influence caused by expressions about pigs

D. discuss some problems caused by expressions about pigs

2. If you give a good book to a person who can’t read, which of the following is the most suitable to describe it?

A. Cast pearls before swine.

B. You can put lipstick on a pig, but it is still a pig.

C. A hog in a silk waistcoat is still a hog.

D. You cannot make a silk purse out of a sow’s ear.

3. A driver who takes up too much space on the road is often referred to as _________.

A. a greased pig　　　　　　　 B. a couch hog

C. a road hog　　　　　　　　　 D. a road earmark

4. How many words which refer to the same animal are mentioned in this passage?

A. Three　　　 B. Four　　　　 C. Five　　　　 D. Six

5. Which of the following expressions are similar to “You cannot make a silk purse out of a sow’s ear.”?

A. When pigs fly!　　　　　　　　 B. To eat like a pig

C. To sell a pig in a pork.　　　 D. To sweat like a pig.

He decided to ______for a position in the publishing house after he graduated from the university.

A. apply　　　　 　B. afford　　 　 C. offer　　　 　　D. look

The library is divided 　　　　four sections, which is popular 　　　　students.

　 A. from; with　 　　　　 B. into; with　 C. from; for　　 D. into; for

She doesn’t answer the doorbell. She ______ be asleep.
A. might       B. should    C. ought to       D. had to

He is so learned a young man that I am sure it would be impossible to find his ________.

　　 A. same　　　　　 B. similar　　　　 C. equal　　　　　　　 D. reflection

Buying something and then finding it on sale the next day can be very__________.?

A.annoying　 B.appealing? C.exciting　 D.interesting?

—You’ve left the light on.?

—Oh,so I have.　　 and turn it off.?

A.I’ll go　　　 B.I’ve gone

C.I go　　　 D.I’m going?

The ______ of students are against your plan.

A. most 　　　　　　 B. many 　　　　　　 C. number 　　　 D. majority