It is necessary that he _________the assignment without delay.

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问题 It is necessary that he _________the assignment without delay.

选项 A、hand in
B、hands in
C、must hand in
D、has to hand in

答案A

解析 本题为虚拟语 气题,考查虚拟语气的用法。形容词为necessary、important、impossible、strange、natural、 essential 等时,在“It+be +形容词或过去分词+主语从句”结构中,主语从句要用虚拟语气,其中的should可以省略。句意:他必须按时交作业,故选A。
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