问题
选择题
Every one should make a contribution _______ protecting the environment.[ ]
A. to
B. in
C. at
D. for
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Every one should make a contribution _______ protecting the environment.[ ]
A. to
B. in
C. at
D. for
答案：A