题目

Business is improving but much more hard work and common sense will be _____ before any profits can be realized. A. put up with               B. called for  C. gone through              D. taken up   答案：B We won’t give up　 __________　　 we should fail 10 times. A.even if　　　　　　　　 B.since C.whether　　　　　　　 D.until