问题
选择题
Cars and buses________ stop when the traffic lights turn red.[ ]
A. can
B. need
C. may
D. must
答案
答案：D
搜题请搜索小程序“爱下问搜题”
Cars and buses________ stop when the traffic lights turn red.[ ]
A. can
B. need
C. may
D. must
答案：D