There are five_____students in our school.

　　A.hundreds of     B. hundreds    C. hundred     D. hundred of

 

There are five_____students in our school.

　　A.hundreds of     B. hundreds    C. hundred     D. hundred of

 

There are two ___ books in our school library.
　　A. hundreds　 　　B. thousands　 　　C. hundreds of　 　　D. hundred
　　

D　当与具体数字连用时百，千等词用单数。　
　　

　Moreno, Stanley, and 23 other students from Westfield State College were on vacation in Acapulco, Mexico. This was the last night in the hotel. It was 4 am, Moreno and Stanley came back from a party.

　　Just as Stanley went to sleep, he heard loud noise outside. From the balcony (阳台) of their fourth-floor room, Moreno and Stanley saw black smoke out of one window and heard people shouting.

　　Moreno ran out into the corridor and began knocking on doors and shouting, "Fire!" After that, he went upstairs in a hurry to tell other people. At the same time, Stanley was downstairs helping people get through the smoke-filled room. There he joined forces with Nalewanski, a 21-year-old boy who had a room on the second floor.

　　"Let's go," Nalewanski said. He and Stanley wet their shirts in the bathroom and put them around their mouths and noses so they could breathe. Then they ran up the stairs. On the fourth floor they found Moreno feeling terrible (Moreno had made it up to the eighth floor before turning back). But after making sure he could get back down on his own, they continued upstairs, knocking on the doors on every floor.

　　In the end, no one was seriously hurt. Moreno said, "There were hundreds of people in the hotel. It was our duty to help them."

1. 　　　 students from Westfield State College were on vacation in Acapulco, Mexico.

A．Twenty-three	B．Twenty-four
C．Twenty-five	D．Twenty-six

2. Which floor does Stanley live on?

A．The second floor.	B．The fourth floor.
C．The seventh floor.	D．The eighth floor.

3. Nalewanski and Stanley put their wet shirts around their mouths and noses in order to 　　　 .

A．make them cool

B．stop the smoke from going into lungs (肺)

C．let people find them

D．play a joke with other people

4. What is the correct order?

　　　a. Moreno told other people.

　　　b. No one was seriously hurt.

　　　c. Nalewanski joined them to save people.

　　　d. Stanley and Moreno saw the smoke.

A．d-b-c- a	B．d-a-c-b
C．a-d-c-b	D．c-d-b-a

5. From the fourth paragraph, we can know 　　　

A．the three boys are brave

B．Moreno died in the fire

C．the reason of the fire

D．Nalewanski called the police for help

 

Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries slowly.

　 You probably know how to ride a bike safely. Now learn to use a computer safely.

Your eyes

　 Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.

　 When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes.

Your hands and wrists (手腕)

　　Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows (肘部） at the same height as the keyboard. 3) Stop something and exercise your hands, wrists and fingers in a different way.

Your back

　　Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.

　 Enjoy your computer, but use it safely.

1.A computer screen may injure your eyes if __________.

A．you sit 60 centimeters away

B．you remember to look away

C．your eyes are too close to it

D．the window is on your left or your right

2.Hand and wrist injuries are caused when you _________.

A．get plenty of exercise

B．move in the same way again and again

C．rest your wrists on something

D．keep your elbows as high as the keyboard

3.Your eyes and hands will be safe if __________.

A．you work near a window

B．you often take a rest from working

C．you use a keyboard for a long time

D．the window is behind you

4.It is good for your back and neck if you sit __________.

A．in the right way

B．for many hours

C．with the screen below your eyes

D．with your back leaning forward

5.What would be the best title for the passage?

A．How to protect your eyes

B．How to protect your hands and wrists

C．How to use a computer safely

D．How to protect your back