Itistenyearssincethescientisto

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It is ten years since the scientist ______ on his life’s work of discovering the valuable chemical.

A．made for

B．set out

C．took off

D．turned up

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Give me an undisturbed hour and I ________ the work Tom has left unfinished.

A．see to	B．will see to
C．would be seeing to	D．have seen to

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Lucy has changed a lot since she got her new job. Recently she ________ her work quite well.

A．has been doing	B．has done
C．did	D．had done

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If you ________ to their home, remember to bring a small gift.

A．invite	B．were invited
C．have been invited	D．had been invited

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—Oh, God! Somebody ________ the cup.
—It wasn't me. I didn't do it.

A．was breaking	B．is breaking
C．has broken	D．had broken

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I ________ him in time, otherwise he would have fallen off the bike.

A．had supported	B．supported
C．have supported	D．support

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