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题目
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

提问时间:2020-06-13

答案
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...
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