第四部分：完成句子(共16小题；每空0.5分，满分20分)
1．校长为他颁发了优秀学生奖。
The headmaster          him         the        for excellent students.
2．在某人受伤时，懂得急救知识能发挥重要的作用。
It is a knowledge of                             can make a real difference when someone is hurt.
3. 过去五年来，他一直致力于发展他的事业。
For the last 5 years he                all his efforts                his business.
4. 我们应该乐观向上，永远对生活保持一种积极的态度。
We should be         and always keep a                          life.
5. 为了图方便, 我把参考书放在书桌前。
I keep my reference books near my desk               .
6. 看起来一些自然灾害应归咎于全球变暖。
It seems that global warming could be                        the natural disasters．
7. 专家提出的计划得到了政府的认可。
The project                by         has been accepted by the government.
8. 尽量少吃脂肪和糖份含量过高的食品。
Try to cut back on ______ ______ too much fat and sugar.
9.                 (从……看来)what he said just now, he must be very cruel to others.
10. A team of researchers studied Earth's Cracks for two years and was surprised to find that the cracks may                  (促进)Global Warming. 
11. Though             money（缺钱）,his parents still managed to send him to study abroad.
12. Daily homework is necessary, but                         homework （作业量）should be limited，for a student’s all-around development is more important than anything else in his or her life. 
13. You are                        （冒险）in lending him so much money.
14. The teacher                （坚信）he is a talented student
15. The rain was heavy, and       （结果）the land was flooded.
16. He felt disappointed at the news, wandering in the street        （无目标）.