parents don't allow their children__out alone at night.a,going b.to go c.go d.goes
问题描述：
parents don't allow their children__out alone at night.
a,going b.to go c.go d.goes
答
b.to go
答
b.to go 父母不容许孩子单独夜出
答
选a，这个问题可以从语态上来区别：to do只能当allow用在被动语态的时候才能用，也就是只能是这种形式：
sb be allowed to do sth
He was allowed to drink some wine.
而allow doing 这种用法allow只能用在主动语态中，即：
sb allow doing sth
They allow our taking photo here.
从意义上来分别：
to do 结构中do的发出者是句子的主语(he)；
doing结构中do的发出者不是句子的主语，而是另有他人(we)。
答
b. to go
allow sb to do sth 允许某人做某事
希望能帮到你，祝更上一层楼O(∩_∩)O
有不会的欢迎再继续问我(*^__^*)
答
B
allow sb to do sth 允许某人做某事
是固定结构
祝你学业进步!
答
go