He bought a book that could glee him much knowledge and ______ could help him to kill the time．

Tina, remember the plants after lunch.—OK, mum. I’ll do it.

You should have watered the flower earlier, ?

The article suggests that when a person _________ under unusual stress he should be especially careful to have a well-balanced diet.

Was it at the school gate,if I may ask, you met your friends from your hometown?[ ]