问题
选择题
It's getting dark, _______ they're still working.[ ]
A. and
B. but
C. so
D. or
答案
答案：B
搜题请搜索小程序“爱下问搜题”
It's getting dark, _______ they're still working.[ ]
A. and
B. but
C. so
D. or
答案：B