It’s dangerous to let the children who are walk across the crowded street.A. too young to

问题补充：

It’s dangerous to let the children who are walk across the crowded street.

A. too young to

B. so young

C. not old enough too

D. so young as to

答案：

A. too young to

(答案→)B. so young

C. not old enough too

D. so young as to

解析：可联系答.案.网客服索取。