---WhywasJohnlatelastnight?---Itwas______heoverslept.A.thatB.whyC.whatD.be

发布时间：2020-08-07 03:54:41

---Why was John late last night?---It was ______ he overslept.A.thatB.whyC.whatD.because

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D解析引导表语从句，表示原因。
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