1 . Some people prefer to go out for travelling since it can increase their knowledge and________ ________ ________ (开阔眼界)．(根据汉语提示完成句子)

2 .
1. 夏天，长时间暴露在阳光下对我们的健康有害。(expose)
In summer, ______ the sun for a long time does harm to our health.
2. She is the person ______ ______ you can expect good advice. (定语从句)
3. 他一进入实验室就开始着手做实验。(no sooner)
__________the laboratory ______ he set out to do the experiment.
4. 你到底是在哪里找到你丢失的笔呀？(强调句型)
________you found your lost pen?
5. 昨天晚上一定下雨了，因为地面很湿。(情态动词must)
It ______ last night, for the ground is so wet.

3 .
1. Services should be run to suit the ______(方便) of the customer, not the staff.
2. I was looking forward to working under her expert ______(指导).
3. Don’t ______(犹豫) to contact me if you need any more information.
4. For your own ______(安全), please keep away from the tiger cage.
5. My father is pretty ______(流利) in Italian.
6. Miller was a quiet and ______(rely) man.
7. One by one, the applicants left the interviewer’s office with ______(disappoint) looks on their faces.
8. He was charged with his ______(honest).
9. They got ______(stick) in the traffic jam.
10. Many elderly people expressed a strong ______(prefer) to live in their own homes.

4 .
1. A person who______ _____ ______(遵守诺言) is always welcome in the group.
2. When seeing the frightening bear, the little boy________ _____ _______.(屏住呼吸）
3. Who is       ______ _____ ______ (因……受责备）starting the fire?
4. _______ _____ ______ (暴露在）nuclear radiation, even for a short time, may produce variants(变异体）of genes in human bodies.
5. I think teachers need to______ _____ ______students.(对…严格）