One of the most important questions they had to consider was ____ of public health.A.that B.which

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One of the most important questions they had to consider was ____ of public health.
A.that
B.which

选A
考查代词的用法.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.

A

我选A。
定语从句中,当先行词是形容词最高级或被形容词最高级修饰时,只能使用“that”。