完成句子　根据所给的汉语，完成下列句子。
阅览室的书不允许被带出去。
The books in the reading room ____________________________________.
我有很多作业要做，我经常熬夜来完成这些练习。
I have so much homework to do that I often _________________________.
你确定他们经常在实验室里做实验吗？
Are you sure they _____________________________________?
因为大雨，我们别无选择，只能放弃旅行。
We ______________________________________because it rained heavily.
彼得在学习上取得了很大进步，他的父母都很开心。
Peter _____________________________________that his parents are very happy.
他很有想象力，能很快想出各种办法。
He is imaginative enough ______________________________________.