1. how soon 指再过多久,多久以后,主要用来对表示将来的一段时间常用于将来时 。(常用in短语回答如in an hour, in two weeks 等)提问,2.how long指多长时间,主要用来对一段时间(如three days, four weeks 等)提问1.—___(How soon)__will you be away?—In a couple of weeks. A.What time B.How soon C.How often D.How long2.—Xiao Wang,__(how long)__will it take to fly to Guangzhou?—Sorry,I don’t kno