---Mum, may I go out to play football this afternoon?

---You can if your homework      .

— Mum, my friends are waiting for me outside. May I go out to play with them?
— Yes, you        , but be careful, please.

— Mum, my friends are waiting for me outside. May I go out to play with them?

— Yes, you        , but be careful, please.

A．shall             B．must             C．may              D．should

---Mum, may I go out to play football this afternoon?

---You can if your homework       .

1. A.
   is done
2. B.
   will do
3. C.
   has done
4. D.
   will be done