问题
选择题
—Must we keep the windows open all the time?
—No, we ________. [ ]
A. don't have to
B. mustn't
C. must not
答案
答案：A
搜题请搜索小程序“爱下问搜题”
—Must we keep the windows open all the time?
—No, we ________. [ ]
A. don't have to
B. mustn't
C. must not
答案：A