--Must we stay here waiting for you? --No, you ______. A.needn't B.can't C.shouldn't
---Would you like a piece of cake? ---________. I'm full.
________ your daughter often help you ___________ the housework?
---How many students are there on the playground? ---_________.
That bag is too ________, who can help me carry it?
Hobo doesn’t know ____________ .