Don"t come ___ you are invited.A．unlessB．if notC．whyD．that

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Don"t come ___ you are invited.

A．unless

B．if not

C．why

D．that

答案

解析

unless可相当于if not，但用于句中时，不可说：if not you are invited ，可以说if you aren"t invited，所以选unless。

举一反三

This pen is ___ mine, ___ his.

A．never, except

B．nor, also

C．not, but

D．not, or

题型：不详难度：| 查看答案

We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.

A．since

B．if

C．unless

D．until

题型：不详难度：| 查看答案

---The Bird"s Nest, isn"t it?

---Yes. It"s ___________we visited during our stay in Beijing.

A．where

B．what

C．when

D．That

题型：不详难度：| 查看答案

----____________when has he started boxing?

----2006, I suppose.

A．In

B．Since

C．Before

D．After

题型：不详难度：| 查看答案

Tom shut everybody out of the study ___ he could prepare for the coming exam.

A．which

B．when

C．so that

D．as if

题型：不详难度：| 查看答案