问题
选择题
The environmental problem _____close attention and careful thought. [ ]
A. calls on
B. calls for
C. pays
D. gives
答案
答案：B
搜题请搜索小程序“爱下问搜题”
The environmental problem _____close attention and careful thought. [ ]
A. calls on
B. calls for
C. pays
D. gives
答案：B