问题

How much shall I pay for the phone call? —You________. This is free of charge.

A:shouldn't
B:can't
C:don't have to
D:mustn't

正确答案是：

同类题型

Is this a photo _____ your family

Don’t try to do everything at once. Take it a bit ________.

下列各句中，没有语病的一句是（）

not native, if he were, we _______ thisdiscussion over his identity.

e things getting on with your work —–Oh, I’m sorry. Things aren’t goingso well as _______.