I really don not know ----he will have time this afternoon o

学习时间:2026-11-12 21:30:10 阅读：1012

I really don not know ____he will have time this afternoon or tomorrow morningA.that B.what C.whether D.if

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2026-11-12 21:30:10

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选Cwhether。or 是否的意思if在引宾语从句时也有是否的意思,但是不能和or连用再问： whether不是和 or not 连用吗再答： or not 和or 都选whether