Question

---Mum, ________ I go out to play ?

---Yes, you can. But you must finish your homework first.

1. A.
   must
2. B.
   may
3. C.
   will
4. D.
   need

Answer 1

B
考查情态动词。句意为：----妈，我可以出去玩吗？----是的，你能，但你必须先完成作业。must必须、一定；may表示许可；will是助动词；need需要。