首先,was之后不是從句,所以不能選從句引導(dǎo)詞what和which；
其次,that為指代詞,其可換成天the one,為避免重復(fù),故用that指代,而this無此用法
1.One of the most important questions they had to consider was____of public heal
1.One of the most important questions they had to consider was____of public heal
h.
A.what.B.this C.that.D.which
為什么選C啊
h.
A.what.B.this C.that.D.which
為什么選C啊
英語人氣：376 ℃時(shí)間：2019-09-01 11:03:59
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