1 . All his attention was ________ on one thing-how to solve the problem of water shortage

A．stress

B．delivered

C．paid

D．focused

3 . 请根据句意选择方框中合适的短语并用正确的形式填入句中。

check in,     addicted to,     apply for,     check out,     take control of, sign up for,     concentrate on,     focus on,     what if,     other than

1. After a good rest of a night, they packed and ________ of the hotel.
2. Our company ________ six factories throughout China.
3. She turned down the invitation of the birthday party in order to ________ her studies.
4. ________ the teacher finds out that you haven’t finished your homework?
5. Teenagers who are ________ the Internet are more likely to suffer from depression.