1 . Nobody noticed when he entered the classroom; he ___________________it from the back door.(slide)
没人注意到他什么时候进的教室；他一定是从后门溜进来的。

2 . 完成句子
1. In ________(在制定计划时), they went to the library to refer to many books. (draw)
2. ________(聚集在入口周围) of the cave, villagers nervously watched him go down and disappear in the darkness. (gather)
3. ________(她是否喜欢这个礼物) is not clear to me. (like)
4. ________(多给与关注), the trees could have grown better. (give)
5. ________(我突然想到) I had left my cellphone behind at the bookstore. (occur)
6. Don’t be too rude to your father. Never in his life ________(对他说话) in that way up to now. (speak)
7. The government is trying to do something to ________(促进更好的了解) between the two countries. (promote)
8. The road outside is wet.It ________(准是一直在下雨) last night. (rain)
9. It seems that he is not fit for the job, ________(他所需要的) is more experience. (call)
10. Some species of animals have become extinct because they ________(不能适应) the changing environment. (adapt)

3 . The children________lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.

A．must have got	B．must get
C．should have got	D．should get