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王老师:19139051760(拨打)
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第1题

A new technique______, the yield as a whole increased by 20 per cent.
· working out
· having worked out
·having
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第2题

The boy’s father bought him a large toy train_____.
· to play with
· to play with it
· which to play with
·
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第3题

There are more tha50 proposals_____ at the conference.
· discussed
· discussing
·to be discussed
·having bee
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第4题

It was impossible to avoid_____ by the stormy weather.
·to be much affected
·being much affected
·having much a
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