问题
选择题
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
答案
答案：A
考查recommend用法。Recommend后面的宾语从句用虚拟语气should+动词原形构成，should可以省略。A选项省略了should.