Anewtechnique,theyieldsasawhol

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A new technique_________, the yields as a whole increased by 20 percent.

A．working out

B．having worked out

C．having been worked out

D．to have been worked out

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相关试题

I must apologize for __________ ahead of time.

A．letting you not know	B．not letting you know
C．letting you know not	D．letting not you know

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You must __________ the key information in the text if you want to choose the correct answer.

A．leave out	B．let out
C．make out	D．find out

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We are at your service. Don't ________ to turn to us if you have any further problems.

A．beg

B．bother

C．intend

D．hesitate

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It is foolish of him to __________ his notes during that important test, and as a consequence, he got punished.

A．stick to

B．keep to

C．refer to

D．point to

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I am willing to do whatever my country requires __________ me.

A．on

B．for

C．of

D．to

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