Parents are taught to be aware of important mental health is to their children.A. thatB.

问题补充：

Parents are taught to be aware of important mental health is to their children.

A. that

B. how

C. what

D. so

答案：

A. that

(答案→)B. how

C. what

D. so

解析：

试题分析:考查宾语从句。从结构可知介词of后跟的是宾语从句，只有连接副词how可以既能引导宾语从句又能修饰形容词important。故B选项正确。句意：家长应该被教给去意识到心理健康对孩子是多么的重要。