before we find the approach to cure the cancer/cancers.该选哪个

before we find the approach to cure the cancer/cancers.该选哪个 If the end-user find it necessary to replenish their stock before the end of this year,we shall _____ you again.选项:a、meetb、contractc、communicated、contact we didn't find our seats till the play had begun.till能换成before吗 we were delighted to find the trees planted a year before ____very tall,应填growing还是being grown还是having been growing those word a days my friend 求舞曲歌名once part the time i was were we's Remember how relaxed a those word a days my friend 什么歌before the never we find the never lost 选择：Before it was dark we must find a place ——.Before it was dark we must find a place ---- .A .to live B.that we should live in C.where we could D.which we could live should we attempt to find a publisher before the book is completed _.at least announce that we are doing the book?Aand Bor Cso Dbut我选的是A, Scientists agree that it will be a long time ___(我们找到了治愈癌症的方法)标准答案是：before we find the methods of curing cancers我不明白为什么加before在前面? we must find a attached please find the pillow logo for your approval is it the one for you?For we can’t find all the files of before. we will make a decision before the 36th september we must find a s____ from the rain right now We must find a person ___ (do) the work. we must find a way to deal with the cat we left the place a day before.,before能放在a day前面吗 we had trouble___the path through the froest,a)to find b)for find c)finding With the exam approaching,I find myself_____harder than ever before A .worked B.to work 改错 We find it impossible get there before 8：00