the age of sixteen, he joined the army. [ ]A．On

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              the age of sixteen, he joined the army.             [     ]
A．On
B．At
C．When
D．As

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举一反三

She looks so young that I wonder whether she is fit for the job____     a manager.          [     ]
A．like
B．as
C．of
D．with

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Who can help me find the key _____ the door?       [     ]
A. to
B. in
C. of
D. with

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He sits ______ me. Which is wrong?[ ]
A. next to
B. besides
C. in front of
D. behind

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用适当的介词填空。
1. Where would you like            visit?
2. Hong Kong is a good place ____     shopping.
3. Can you Provide me ____     some information about Hainan?
4. Where would you like to go____     vacation7
5. Shanghai is             the east of China.

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She is going to do it____ a minute.   [     ]
A.in
B.after
C.during
D.within

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