—Undernocircumstancesthedoorto

—Under no circumstances ________ the door to the Data Centre unlocked.
—I promise I'll be more careful in future.

A．you need to leave	B．should you leave
C．need you leave	D．you should leave

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-________ to speak of.

A．No

B．Nothing

C．None

D．Neither

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A．must have studied	B．might study
C．should have studied	D．would study

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A．given away

B．kept away

C．taken up

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A．aid

B．basis

C．belief

D．access

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You should look _______ into the matter to get more information about it.

A．farther

B．far

C．farthest

D．further

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