If you ________ Beijing Duck，I"d like to treat you to a meal at a famous duck re

题型：不详难度：来源：

If you ________ Beijing Duck，I"d like to treat you to a meal at a famous duck restaurant．

A．didn"t try

B．don"t try

C．haven"t tried

D．hadn"t tried

答案

解析

考查时态。语意为：如果没有吃过北京烤鸭，我将在北京著名的烤鸭店招待你。not try是过去没有发生，持续到现在的动作，应该选现在完成时。
【标签】考查时态

举一反三

They said that they ______ a wonderful time in Beijing and they hoped to be there again.

A．had	B．would have
C．would have had	D．could have

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.--- Haven"t I told you that I like the beef well done?
---Yes, but I _____ it longer than I usually do.

A．was cooking

B．will cook

C．cooked

D．had cooked

题型：不详难度：| 查看答案

Although the causes of cancer_____, we do not yet have any practical way to prevent it.

A．are being uncovered

B．have been uncovering

C．are uncovering

D．have uncovered

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—I’ve got to go now.
—Must you ?I ______you could stay for dinner with us.

A．think	B．thought
C．have thought	D．am thinking

题型：不详难度：| 查看答案

——— Ring me at six tomorrow morning， will you?
——— Why that early? I ______ .

A．will be sleeping

B．have slept

C．have been sleeping

D．will sleep

题型：不详难度：| 查看答案