Onlywhenwefailedtheimportanceo

Only when we failed ________ the importance of study.

A．we realized

B．we had realized

C．did we realize

D．had we realised

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A．such as

B．for example

C．namely

D．that is

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A．force

B．energy

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A．consume

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A．like

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—Readyto give up guessing, Sandy?
—No, no, hold on! I think I __________ at the answernow.

A．arrive

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