The teacher asked us ______ the playground after the sports meeting.
[     ]
A. clean
B. to clean up
C. cleaning up
D. to clean over
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科目：初中英語 來源：外研社七年級英語(上)練習題 題型：016

My mother is a teache in ________ university．

[　　]
A．

a

B．

an

C．

the

D．

/

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