填连词,使主从复合句完整Someonecalledmeupinthemiddleofthenight,buthehungup()Icouldanswerthephone.
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题目内容：
填连词,使主从复合句完整
Someone called me up in the middle of the night,but he hung up ( )I could answer the phone.
优质解答
before
半夜有人打我电话,但是我还没来得及回答就挂断了
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