题目
()you won t know the answer. A. Unless you listen carefullyB. If you don t listen carefullyC. If you listen carefullyD. Until you don t listen carefully
()you won t know the answer.
- A. Unless you listen carefully
- B. If you don t listen carefully
- C. If you listen carefully
- D. Until you don t listen carefully
题目解答
答案
A,B