摘要： A. in B. on C. at

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Sheep feed ______ grass.
[     ]
A. in
B. on
C. at
D. out
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We have math ____________ Monday.

A.in                        B.on                        C.at

 

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Please call me ___ 2137718.

A. in B. on C. at D. for

 

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What's this _____ English?
[     ]

A. in
B. on
C. at
D. and

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Please call him _____ 2589867.    
[     ]
A. in        
B. on        
C. at        
D. of
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