They’re ________ choosing a cautious policy in order to avoid a risk in such an important event [ ]

Could you tell me how many books I can borrow at a time— Sorry， ______ at all . Our compute system has broken down.

Wang Haijian, Hubei bombing principal, was shotto death for his leading role in __________ a homemade bomb near a branch ofstate-owned China Construction Bank in Wuhan on Dec. 1, 2011.

Don’t forget to return the book to the library. You have _______ it for two weeks.

If we want to study English well, we should do more exercises.– . Practice makes perfect.