Althoughthecausesofcancer,wedo

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Although the causes of cancer_____, we do not yet have any practical way to prevent it.

A．are being uncovered	B．have been uncovering
C．are uncovering	D．have uncovered

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相关试题

Although he failed when he tried doing the experiment for the first time, he decided to try it____.

A．once in a while

B．at once

C．once more

D．once

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–Is there something I can do now? -Yes.______ the meat for cooking meat ball.

A．Cut in

B．Cut out

C．Cut up

D．Cut through

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I tried phoning Maggie’s office in the morning, but I couldn’t _____ .

A．go over

B．get through

C．put up

D．join up

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I had been working for a whole day at that time and was really ____a good rest.

A．in place of

B．in search of

C．in memory of

D．in need of

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She is too fat, but she can’t ________ sweets.

A．remove

B．object

C．reject

D．resist

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