2. He began to work __________ he got there.

3. Let's begin our meeting __________everyone is here.

4. I like the English people, __________ I don't like their food.

5. __________ you go in China, you can see smiling faces.

6. He didn't come to the lecture, __________ he was very busy.

7. __________we had enough time, we walked to the cinema.

8. They will help you __________ you meet with difficulty.

9. _________ we came to the university, we have learnt quite a lot.

10.I didn't join them yesterday evening __________ I had to go to an important meeting.

11. We would try to get a car __________we could all travel together more easily.

12. She wouldn't forget her mother's birthday __________ she seldom wrote to her family.

13. We're doing everything we can to make things as easy for you ___________we can.

14. The meeting became so disorderly __________ the speaker had to shout the audience down.

15. He was angrier __________ ever before.

16. __________ you lock all the doors, he can still manage to get in.

17. The boy was so tired __________ he fell asleep on the bus.

18. Hard _________ he tried, he couldn’t force the door open.

三、选择填空：

1. I’ll let you know ____ he comes back.

A. before B. because C. as soon as D. although

2. She will sing a song ____ she is asked.

A. if B. unless C. for D. since

3. We will work ____ we are needed.

A. whenever B. because C. since D. wherever

4. Read it aloud _____ the class can hear you.

A. so that B. if C. when D. although

5._____ you go, don't forget your people.

A. Whenever B. However C. Wherever D. Whichever

6. It is about ten years _____ I met you last.

A. since B. for C. when D. as

7. They will never succeed, _____ hard they try.

A. because B. however C. when D. since

8. _____ still half drunk, he made his way home.

A. When B. Because C. Though D. As

9. _____ she was very tired, she went on working.

A. As B. Although C. Even D. In spite of

10. Busy _____ he was, he tried his best to help you.

A. as B. when C. since D. for

11. I learned a little Russian _____ I was at middle school.

A. though B. although C. as if D. when

12. _____ we got to the station, the train had left already.

A. If B. Unless C. Since D. When

13. _____ the rain stops, we' 11 set off for the station.

A. Before B. Unless C. As soon as D. Though

14. She was _____ tired _____ she could not move an inch.

A. so, that B. such, that C. very, that D. so, as

15. We didn’t go home _____ we finished the work.

A. since B. until C. because D. though

16. I'll stay here _____ everyone else comes back.

A. even if B. as though C. because D. until