Youshouldneverbaseanythingonat

You should never base anything on a theory that _________ impractical in practice.

A．is proved

B．prove

C．proves

D．proved

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Neither Tom nor Jack and I ________ his students, but each of us ______ him very much.

A．am; likes

B．is ; love

C．are ; likes

D．was; loves

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A．knowing ; finding	B．knew; to find
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A．came across; worried	B．bumped into; particular
C．knocked into; complained	D．ran into; curious

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—What time will Mr. Brown be back to China?
—Sorry. I don’t know______.

A．when did he go abroad	B．why he is going abroad
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