We don’t ______ students staying up late.

Chris, please ________ a meeting with Mr. Du for me this evening who came back from Canada yesterday.

Though the road covered with snow was very smooth, the old man smilingly ____ to be helped by others across the road．

Huge trees on the green land were cut down, ____ the city being buried by sand.

This picture was taken a long time ago. I wonder if you can ________ my father.