问题
选择题
You'd better make a mark _____ you have any questions.
A．at which
B．at where
C．the place
D．where
答案
答案：D
搜题请搜索小程序“爱下问搜题”
You'd better make a mark _____ you have any questions.
A．at which
B．at where
C．the place
D．where
答案：D