(   ) 7. He promised    to pick me up at the school gate. However, he       yet.

A. didn’t arrive

B. doesn ’ t arrive

C. isn ’ t arriving

D. hasn ’ t arrived

(   ) 6. It’s getting dark. Please      the    light.

A. turn on    B. turn    off

C. turn down    D. turn    up

(   ) 5. —Your classroom is very clean.

—Sure. It       after    school    every day.

A. is cleaned    B. cleans

C. cleaned    D. is cleaning

(   ) 4. —He’s never stolen anything before, he?

—      . It ’ s his first time to be taken

to the police station.

A. hasn’t; Yes    B. has; Yes

C. has; No         D. is; No

(   ) 3. —May I smoke here?

—If you        ，choose a seat in the smoking section.

A. can    B. must

C. may    D. need

(   ) 2. His mother      a    worker in that factory. Now she is a driver.

A. used to    be       B. used

C. used to    being    D. used    be

(   ) 1. —I think I ’ 11 give Bob a ring.

—You       . You haven ’ t been in touch With him for ages.

A. will       B. may

C. have to    D. should

从方框中选择合适的单词，并用其适当形式填空。

1. If      is  burnt, they’ll give off poisonous (有 毒的）gases.

2. Freezing winter is      to orange trees.

3. He wipes his mouth on the      .

4. We should      garbage, not bum it.

5. The information        is  important for our country.

   Sand cats come from deserts like the Sahara (撒哈拉沙漠）.They have wide faces and big eyes. If you are lucky enough to see one in person, you will

1.        (find) it is one of the cutest animals. In the deserts of Africa and Asia, sand cats like 2.       (live) alone. They usually live in holes made by other small animals. At their largest, they are a little 3.        (little) than two feet long.

Their wide heads give them young, lovely faces. They look for food at night and feed on small animals like snakes. 

     There are not many sand cats in the world, so it’s important to keep them 4.        (safety). However, it is difficult to keep them in zoos. Sand cats in zoos 5. (  easy) get kinds of common diseases. In order to successfully keep sand cats, zoos have to create very special environment just

for them. This 6.        (mean) that, if sand cats are in danger, it's difficult to 7. __ (save) them. It wasn ’ t until 2005 that a sand cat baby was successful 8.        ( raise) in the zoo for the first time. Luckily, people have done something to stop the sand cats from 9.       (be) in danger. Outside their native living places,

there are not many 10.        ( opportunity) to see sand cats. In the USA, there are only 26 sand cats in zoos. Most of us will just have to look at pictures and videos of these lovely wild animals online.

(   ) 6. —When       this    kind    of car      ?

—Three years ago.

A. did ; produce

B. was; produced

C. is; produced

D. does; produce