单项选择题
Mr. Smith is coming to visit us soon. We'd better get everything ready before he ______.
A.arrives
B.arrive
C.will arrive
D.arrived
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单项选择题
75()
A.ensure
B.separate
C.spread
D.switch
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单项选择题
74()
A.Replacing
B.Liberating
C.Taking
D.Depending
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