--- May I go now?

--- No. You ______________ let the teacher know first.”

--- May I go now?
--- No. You ______________ let the teacher know first.”

-May I go now?

-No, you ________. You ________ stay here.

1. A.
   needn't, have to
2. B.
   needn't, must
3. C.
   mustn't, have to
4. D.
   mustn't, has to

---“May I go now?”

---“No. You ______ let the teacher know first.”

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

--May I go now?

--No, you ________. You  _____stay here.

A. needn’t; have to               B. needn’t ; must

C. mustn’t; have to              D. mustn’t; has to