They ________to enter the building by the back door; however, the back door was locked．

A．weren't supposed

B．wouldn't be supposed

C．were supposed

D．would be supposed

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参考答案

C。本来以为他们会从后门进来的，但是后门锁上了。
考查动词时态。be supposedto do sth．为固定搭配，意为“应该，被期望”。

1 There was a ．knock at the door．It was the second time someone ________me that evening．

A．had interruped

B．would have interrupted

C．to have interrupted

D．to interrupt

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2 Our modem civilization must not be thought of as ________in a short period of time．

A．being created

B．to have been created

C．having been created

D．to be created

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3 When Jane fell offthe bike, the other children______

A．were not able to help laughter

B．could not help but laughing

C．could not help laughing

D．could not help to laugh

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