问题

These problems, __________, will seriously affect the growth of teenagers and even the nation’s future.

A:solved properly
B:if solved properly
C:not if properly solved
D:if not solved properly

正确答案是：

同类题型

Peter, who had waited for an hour, was very angry with his sister when she_____ turned up[ ]

This is between you and me.— I promise. I won’t tell others ______you say I can.

Don’t shout at him. He _______.

It’s a common scene in the film Tangshan Earthquake that families cry helplessly over _____ is left of their homes.

I can’t remember those grammar rules!—__________. Practice more.