Mr Liu is a very popular doctor, so he is always busy______his work.[ ]A. wi

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Mr Liu is a very popular doctor, so he is always busy______his work.[     ]
A. with
B. for
C. about
D. on

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举一反三

This is a school____ children____3-7.  [     ]
A. on; for
B. for; of
C. of; about
D. for; about

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Do you want to work______ three young boys?    [     ]
A. as
B. with
C. in
D. on

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—Thanks______your help.
—My pleasure.     [     ]
A. of
B. on
C. for
D. With

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We are waiting___ the bus stop(车站).[     ]
A. for
B. at
C. from
D. of

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I can see two birds_____the tree and some red apples_____the tree.      [     ]
A. in; on
B. on; in
C. in; in
D. on; on

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