We have never been to Mexico , what about Jeff —– _________. He hopes to visit it some day .

Could you tell me ______ I must find him. –Sorry. I have no idea. But he was here just now.

There are some warnings in some countries ______ over exploitation of underground water has caused the decline of wetland and increase of desertification.

The books are so nice, which one can I take —Oh, you can take _______ of them. I’ll keep none.

(2013·高考湖南卷)Around two o’clock every night，Sue will start talking in her dream.It somewhat________us