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With the help of high technology, many new substances（物质）______in the past years.

A．discovered

B．have discovered

C．had been discovered

D．have been discovered

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If you are not sure how to use the words, you may ______ the words in your handout.

A．pick up

B．deal with

C．refer to

D．look up

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This is the last time I ______ Shanghai. I still remember the first time I ______ there was in 2005.

A．have visited, went	B．had visited, went
C．visited, had gone	D．had visited, had gone

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Our company has really taken off and is ______ to make much money this year.

A．probable

B．likely

C．possible

D．perhaps

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Just now you said you always got to work on _______ 8 o’clock train. But would _______ later train get you to work on time?

A．a; a

B．a; the

C．the; the

D．the; a

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—I found the mark rather frightening.
—______ It frightened me to death just now.

A．That's reasonable advice.	B．Isn't it a good idea?
C．Do you think so?	D．I can't agree more.

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