搜题
王老师:19139051760(拨打)
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第1题

Such events _______ only when the external conditions are favourable.

A、commit
B、cause
C、occur
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第2题

He used to ______ very hard when he was young.

A、working
B、work
C、to work
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第3题

I bought a new car last month, but I ______ my old car yet.

A、did not sell
B、have not sold
C、had not sold
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第4题

I.m Michael Bush, Managing Director of Hoogle Engineering. I am pleased to welcome you here to our website and I.d like
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