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第1题

He used to ______ very hard when he was young.

A、working
B、work
C、to work
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第2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3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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第4题

English is spoken as a native language by around 377 million people, and as a second language by around 375 million spea
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