问题

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

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

正确答案是：

同类题型

It is _____third time that John has failed, but he still hopes to have_____ fourth try.

——Flight to London_______ until: tomorrow morning—–No wonder I hear so many complaintsfrom the passengers

Being a ______ tennis player, Williams wouldn’t let anyone or any difficulty stop her.

.．—Dad，I’m worrying about my road test！—Cheer up，dear! There___________be any difficulty about passing it since you have practised alot in the driving school．

_________ that they lost the game, tears came down her face.