10. The meeting was expected to start at 9 o'clock but the manager didn't turn up ______ twenty minutes later.　

A. before　　　　　　 B. until　　　　　 C. after　　　　　　　 D. since

9. Although he was in poor health, Robert succeeded ______　 other more famous engineers failed.

A. which　　　　　 B. that　　　　　 C. what　　　　　　　 D. where

8.　 －Do you have a minute? I’ve got something to tell you.

－Ok, ______ you make it short.

A. now that　　　　 B. if only　　　　 C. so long as　　　　　 D. every time

7. The government has taken some measures to solve the shortage of electricity, but it may be some time　　　　 　the situation improves.

A．since　　　　　　　　　　 B．when　　　　　　　　　　 C．unless　　　　　　　　　　 D．before

6. - Did you remember to give Jack the book?

-Yes, I gave it to him　　　 I saw him.

A. while　　　 　　　B. immediately　　　 C. once　　　　　 D. suddenly

5. Last year I was on the flight across the Pacific Ocean________ a plane crashed.

A. while　　　 　　　　　　 B. when　　 　　　　　　 C. as　 　　　　　　　　　　 D. as soon as

4. They were going to leave _____ it began to rain.

A. when　　　　　　　　　　　 B. while　　　　　　　　　 C. as　　　　　　　　　　　　　 　 D. how

3. I thought her nice and honest _____ I met her.

A. first time　　　　　 B. for the first time　 C. the first time　　 　 D. by the first time

2. They love their daughter so much that they are always ready to do everything they can ____ her happiness.

A. make sure of　　　　　　 B. be sure of 　　　　 　C. to be sure of 　 　D. to make sure of

1．　　 　I admit that there are problems, I don’t agree that they cannot be solved．

A．While　　　　　　　　　　 B．When　　　　　　　　　　 C．As　　　　　　　　 　 D．For