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
AB
A. Unless you listen carefully
B. If you don t listen carefully
A. Unless you listen carefully
B. If you don t listen carefully