There is a big tree ________ the house.

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A．in the front of

B．at the front of

C．in front

D．in front of

What happened while Linda was ________ the telephone?

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________ the boy was walking down the street，the UFO landed．

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What ________ you ________ when you father came back?

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When did you ________ Wuhan?

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Yesterday I saw ________ exciting match.

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It is said that the river has ________.

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It ________ me an hour ago.

[　　]

A．happens

B．happened

C．was happened

D．happened to

The visitor will go to Beijing ________ this month.He has been there _____.

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A．some time，sometime

B．sometime，some times

C．some times，some time

D．sometimes，sometime

The old lady put on her glasses ________ she could see clearly.

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