根据网考网考试中心的统计分析,以下试题在2018/1/31日成人英语三级考试习题练习中,答错率较高,为:51%
【单选题】Every policeman and fireman ______ on the alert.
A. have been
B. was
C. are
D. were
网考网参考答案:B,答错率:51%
网考网试题解析:
当every修饰一个或几个名词作主语时,谓语动词要用单数形式。
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