问题

When television was first introduced, the extent _______ it would affect society could not have been foreseen.

A:of which
B:of what
C:to which
D:in which

正确答案是：

同类题型

______ the best efforts of the desperate mother, the powerless baby elephant seemed to have no hope of escaping, until a team of conservation workers rushed to help.

Where _______ the socks –_______ on the bed.

afraid that you might have gotburnt in the big fire last weekend.—Well, I .

Many large cities,such as Liverpool and New York,have had experiments of this kind,________old factories turned into successful art centers.

下列各组句子中加横线词活用现象不同的一项是（）