---Whathaveyou______hydrogen,Mary?---Balloons.A.havefilledwithB.hadfilledo

发布时间:2020-08-07 01:40:35

---What have you ______ hydrogen, Mary?---Balloons.A.have filled withB.had filled ofC.had filled withD.to be filled

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C解析fill sth. with sth. with的宾语为what。
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