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【参考答案】

将has改为have。
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单项选择题
A．There are more candidates than before.B．The modem industry is developing slowly.C．The written examinations are much easier than before.D．The written examinations are more subjective than the spoken ones.
A．There are more candidates than before.
B．The modem industry is developing slowly.
C．The written examinations are much easier than before.
D．The written examinations are more subjective than the spoken ones.
单项选择题
A．They are necessary for modern man.B．They are unnecessary for survival.C．They are as good as computers.D．They are dangerous for us.
A．They are necessary for modern man.
B．They are unnecessary for survival.
C．They are as good as computers.
D．They are dangerous for us.
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