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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Printing passengers’ names and ID numbers on tickets will make harder to protect their private information.

A．one

B．those

C．it

D．them

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The boys were about to go out to play football suddenly it began to rain.

A．when

B．as

C．while

D．then

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I travelled in Mountain Tai, I was deeply impressed with its beautiful scenery.

A．For the first time	B．At first
C．It was the first time	D．The first time

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This collection three parts: poems, essays and short stories.

A．is consisted of	B．is made up of
C．is made into	D．is consisting of

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– I’m still repairing my car.
- Oh, you’ll be late for the meeting. Time is .

A．running out	B．going out
C．giving out	D．losing out

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