问题
选择题
Do you know the difficulty he has what eco-travel means?
A．understand
B．understood
C．to understand
D．understanding
答案
答案：D
搜题请搜索小程序“爱下问搜题”
Do you know the difficulty he has what eco-travel means?
A．understand
B．understood
C．to understand
D．understanding
答案：D