--- What do you think of pollution of the big factory?--- It’s a serious problem. We should _____ all the people to do something for it.
—Would you like______ to eat ? —Yes,please.
—What’s wrong with her? —There may be something wrong with her ______,she can’t see things clearly.
Could you please tell _____?
–Do you still remember the city ____ we visited last year ? --You mean Zhengzhou? I know there is a factory____ your mother worked.
–I feel a little nervous ____ the exam . --______. All of the students may feel nervous.