Ifoneofthecomputers,thewholene

If one of the computers ___, the whole networks would be unable to work.

A．broke up

B．broke down

C．shut off

D．cut down

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There is even an animal whose tail will so that it can run away if someone grabs it.

A．break up

B．break out

C．break off

D．break down

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Statistics show that shanghai subway lines will reach 350 kms by the end of this year, making the city No. 3 in the world subway length.

A．according to

B．in terms of

C．on account of

D．in view of

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I admit I made a lot of mistakes in the work, and I will responsibility for them.

A．assume

B．decline

C．accept

D．secure

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A．if it were	B．would it be
C．had it been	D．should it have been

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A successful life is a life ____ challenges are met and difficulties overcome.

A．which

B．where

C．what

D．that

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