问题

May I go to the cinema with you this Sunday—I’m afraid not, ____________ you have a ticket.

A:if
B:unless
C:until
D:since;

正确答案是：

同类题型

No one knows exactly ______ this important discovery was made

The children were required to weafford .

It rained cats and dogs this morning. I’m glad we took an umbrella.—Yeah, we would have got wet all over if we ________.

Lucy dances very _________.

Mike _________ English, but now he is better at itthan _________ in his class.