Must I buy lunch at school?—No, you needn’t. You __________ bring your own lunch if you want to.

．— I wonder if you _______ a picnic tomorrow.— Yes. But if it ______, we’ll visit the museum instead.

．—Mary，here’s a dictionary．I hope it will help you．—Thanks a lot．It’s ________ what I need．

It wasproblem thatof the students could work it out.

All of us felt______when we heard the _____news.