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____useful invention the telephone is!
A.What a B.What an C.How a D.How an
答案是A为什么选A useful不是形容词么为什么不用how
人气：186 ℃ 时间：2020-05-29 03:42:20
解答
useful invention是一起的.重点放在invention这个名词上.所以是用what 而且可数要加a
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