—When did it happen? —At 5:55 a.m. ______ the morning of October 15.[ ]A. on

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—When did it happen?
—At 5:55 a.m. ______ the morning of October 15.[ ]
A. on
B. in
C. at
D. by

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举一反三

They have to walk_________8 country parks and___________20 hills and mountains. [     ]
A. up; up
B. over; over
C. through; over
D. along; down

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The children are still upstairs. Go and get them to come ______ for breakfast.[ ]
A. to downstairs
B. from downstairs
C. downstairs

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-What do you think of Mike?
-A nice boy! __________ a monitor, he not only studies hard but also likes helping his classmates.[ ]
A. For
B. To
C. With
D. As

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Liu Xiang is familiar ______ us.[ ]
A. to
B. with
C. by

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We are familiar _____ computers.[ ]
A. with
B. for
C. to

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