问题: 英语选择题
选什么..为什么
21.The number of the workers in this factory______ this year.
A. are increased
B. have been increased
C. has been increased
D. is increased
31.The machine needs _______.
A.be repaired
B.repaired
C.to repair
D.repairing
解答:
第一题选A
the number of的意思是 ...的数量,后面用单数
第二题选D
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