Unit 1 Great scientists Period 2 Learning about Language & Using Language 课时精练（人教版必修5）
时间：30分钟
Ⅰ.短语填空
1．Does smoking ________________lung cancer?
2．This has________scientists________speculate on the existence of other galaxies.
3．I really think his reason for doing it________________.
4．Which books will you borrow，________________this one?
5．He is ________________telling secrets.
6．When we got to the hotel，it was still________________.
7．The writer is________________his new book.
