Question

Teachers recommend parents_____their children under 12 to ride bicycles to school for safety.

A．not allow	B．do not allow
C．mustn’t allow	D．couldn’t allow

Answer 1

A

试题分析：通过分析句子结构，可知这个句子中包含了一个省略了that的宾语从句。这里recommend 是建议，所以宾语从句用虚拟语气，should+动词原形， should可以被省略。
点评：在表示建议 suggest 、advise、propose;要求demand 、desire、request；决定 decide;命令 order、command、require;坚决主张 insist;等动词后跟宾语从句，用（should）+v．（虚拟语气）eg． I suggested that you（should）study hard．He ordered that we should go out at once．