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【单选题】
And you, of tender years, Can't know the ______________ that your elders grew by.A.
tears
B.
fears
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举一反三
【单选题】According to the professor, why is chemistry sometimes called the central science?
A.
Chemistry courses are the most difficult．
B.
Chemical processes occur all around us．
C.
Chemistry students have high status．
D.
Chemists study how to control diseases．
【单选题】The meeting held in our classroom yesterday _____ two hours. [ ]
A.
was lasted
B.
last
C.
lasted
D.
lasting
【单选题】Yesterday we had a long meeting which four hours.
A.
kept
B.
spent
C.
continued
D.
Lasted
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