问题

Great efforts to increase agricultural production must be made if food shortage _____ avoided

A:is to be
B:can be
C:has been
D:will be

正确答案是：

同类题型

下列语句中，没有语病的一项是( )

Helen was much kinder to her youngest son than to the others, _____, of course, made the others envy him.

The young man dove into the cold water to________the drowning boy.Everyone was proud of him.[ ]

I shall never forget those years ________ I lived on the farm _______ you visited last week.

don’t think Jack is a man to be _____ when we are in trouble and need his help.