题目内容
( ) 5. — we keep the room clean enough all the time?
—No,you .
A. Must; doesn’t have to B. Do; don’t have to
C. Must; mustn’t D. Must; don’t have to
D
练习册系列答案
相关题目
题目内容
( ) 5. — we keep the room clean enough all the time?
—No,you .
A. Must; doesn’t have to B. Do; don’t have to
C. Must; mustn’t D. Must; don’t have to
D