---CanItellmybestfriendaboutit?---No,Idon'twantanyoneelsetoknow

发布时间：2020-08-06 18:15:48

--- Can I tell my best friend about it?--- No,I don't want anyone else to know it．You ________ keep it to yourself．A.canB.needC.mustD.may

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C解析must：一定，必须
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