1 . The bag is so heavy ________I can’t carry it. (用适当的词填空)

2 . It was a long time _________ he knew the full result. (用适当的词填空)

3 . Economic development is necessary________ we want to improve society. (用适当的词填空)

5 . The water was shallow but _________ the reef ended, there was a steep drop to the sandy ocean floor. (用适当的词填空)

6 . With global warming becoming more and more serious, it won’t be long _________ some coastal cities disappear.

7 . 单句语法填空
1. ________(face) with so much trouble, we failed to complete the task on time.
2. Scientific research is ________ great benefit to mankind.
3. He tries to create an atmosphere ________ workers can communicate effectively.
4. I won’t have you ________(speak) to your father like that. It is very impolite.
5. She will give warm support to________ needs help .
6. There are so many trees in the forest, the tallest of them________(measure) 50 meters.
7. It was April 29, 2011 ________ Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.
8. Such an honest person is he _______ you can turn to him when you are in trouble.
9. The more exposed young people are to financial issues, the _________(likely) they are to become responsible.
10. I _________ (intend) to see you off at the airport, but I had an unexpected visitor when I was about to leave.
11. Tom as well as two of his colleagues__________(fire) up to now.
12. ___________(bring) up in the countryside made Mr Wilson very hardworking when he was very young.
13. Our school has about 200 computers, but only sixty percent _______(use) regularly.
14. The church __________(date) back to the 18^th century is under repair at present.
15. I had just finished the experiment ______ the power cut occurred.