问题
选择题
Thank you for ______ us a lot this time. [ ]
A．helping
B．helped
C．helps
D．help
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Thank you for ______ us a lot this time. [ ]
A．helping
B．helped
C．helps
D．help
答案：A