II、实战演练
用适当的连词填空：
1. Dr. Bethune (白求恩) came to China __________ he was fifty.
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.
