Question

---Must I hand in my homework before this evening, sir?

---No, you ________ hand it in to me if you haven't enough time.

1. A.
   don't have to
2. B.
   haven't to
3. C.
   needn't to
4. D.
   not have to

Answer 1

A
don't have to = needn't,表示“没有必要干某事”。