问题补充:
单选题I’msorrytotellyouitisnearlyfivemonths___smithgotinjuredintheleg,butIthinkitwon’tbelong____hecompletelyrecovers.A.after; whenB.before; sinceC.that; whenD.since; before
答案:
D解析考查固定句型。It is +一段时间+since 从句 (一般过去时) It won’t be long before +从句 (一般现在时)故