问题
选择题
There will be a talk _____________ environment this aftermoon.[ ]
A. to
B .on
C .in
D. with
答案
答案：B
搜题请搜索小程序“爱下问搜题”
There will be a talk _____________ environment this aftermoon.[ ]
A. to
B .on
C .in
D. with
答案：B