Scientistsanddoctorsacrossthew

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Scientists and doctors across the world have done _____ research over the years, hoping to find a cure for cancer.

A．a great deal of	B．quantity of
C．quite a few	D．a large number of

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相关试题

A lot of revolutionaries _____ their own lives for the liberation of our country.

A．devoted

B．sacrificed

C．contributed

D．delivered

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It’s cloudy outside. Please take an umbrella. _______ it rains.

A．Take it easy	B．Just in case
C．It just depends	D．All right

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When and where to go for our holiday _____ yet.

A．are not decided	B．have not been decided
C．is not being decided	D．has not been decided

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He will never tell lies, and it’s against his _______ for he’s such an honest man.

A．rules

B．regulations

C．patterns

D．principles

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He would have come here on time, but he _____ in the heavy traffic on the way.

A．caught

B．had caught

C．was caught

D．had been caught

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