—Jack, your father has gone out without this umbrella!—Well, take it easy. ________ he es back for it.A.It is long before thatB.It won’t be long sinceC.It will be long beforeD.It won’t be long before
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D解析本题考查固定句式。It won’t be long before...意思是“用不了多久就会……”，符合句意。