问题
选择题
The police recommended parents __________their children under 12 to ride to school for safety.
A．not allow
B．do not allow
C．mustn’t allow
D．couldn’tallow
答案
A
本题考查虚拟语气。recommended后面是一个省略that的宾语从句。而recommend后的宾语从句应用(should)+do,故本题应是：…parents should not allow their children…,should省略了，故选答案：A.