问题
选择题
You ______ jump onto a bus while it is still moving. It is too dangerous. [ ]
A. can
B. must
C. can't
D. mustn't
答案
答案：D
搜题请搜索小程序“爱下问搜题”
You ______ jump onto a bus while it is still moving. It is too dangerous. [ ]
A. can
B. must
C. can't
D. mustn't
答案：D