Whichofthesubjects____________yo

发布时间:2020-07-28 13:14:17

Which of the subjects____________ you are studying is the most difficult?A.whichB.whatC.whenD.that

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D解析which开头引导的特殊疑问句,中间的定语从句用that引导(作主语或宾语),而不用which。
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