问题
选择题
Help others whenever you can _______ you will make the world a nicer place to live in.[ ]
A. and
B. or
C. unless
D. but
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Help others whenever you can _______ you will make the world a nicer place to live in.[ ]
A. and
B. or
C. unless
D. but
答案：A