— ____ we go to help him with his work?
—No, you needn’t.  He ____ finish it all by himself.
A.  Must; can’t    B.  May; can     C.  Must; can

We spend as much time as we can _____English.
A. read     B. to read     C. reading

Even a drop of water ______because it is so important to all the living things.

You have already tried your best, so you _____worry too much about the exams.

Don’t put off today’s work for tomorrow. I mean, today’s work______ today.

I looked everywhere for the book, but I ______find it

Here are some apples. You _________ take any one if you like.

You _______ to tell him the news. It will make him sad.

Please come back soon if you ____ leave now.
A can   B may   C must   D would

---Must I hand in my exercise book now, Mr. Zhao?
---No, you ______. You may give it to me tomorrow.