___is certain is ___prevention is more important than treatment .A.It;that B.What;that C.As;whatD.Wh

题目简介

___is certain is ___prevention is more important than treatment .A.It;that B.What;that C.As;whatD.Wh

题目详情

___is certain is ___prevention is more important than treatment .
A.It;that B.What;that C.As;whatD.What;what
题型:单选题难度:中档来源:不详

答案

B
B “____is certain”在句中做主语,主语从句缺少一个主语,需要用What; “___prevention is more important than treatment .”系表语从句,句意与结构完整,只有that,可以这样用。

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