They required their children ______ TV on week nights.

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问题 They required their children ______ TV on week nights.

选项 A、not watch
B、must not watch
C、not be watching
D、didn’t watch

答案A

解析 require是表示要求的动词,其后的宾语从句中要用虚拟语气。其构成是should do。其中should可以省略。
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