1.One of the most important questions they had to consider w

学习时间:2026-04-07 06:15:22 阅读：9370

1.One of the most important questions they had to consider was____of public healh.A.what.B.this C.that.D.which 为什么选C啊

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2026-04-07 06:15:22

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首先,was之后不是从句,所以不能选从句引导词what和which；
其次,that为指代词,其可换成天the one,为避免重复,故用that指代,而this无此用法