53.One of the most important questions they had to consider was ____ of public health.(全国I)A.what B.this C.that D.which

问题描述:

53.One of the most important questions they had to consider was ____ of public health.(全国I)
A.what B.this
C.that D.which

答:选C解析:本题考查代词的用法.四个选项中,只有that可以代替句单数可数名词或不可数名词,以避免重复.如:The output of steel this year has increased by 20% compared with that in 1992. 今年钢产量比一九九二...