问题
选择题
Climbing is one of ________, I think.[ ]
A. the most difficult activity
B. the most difficult activities
C. most difficult activity
D. most difficult activities
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Climbing is one of ________, I think.[ ]
A. the most difficult activity
B. the most difficult activities
C. most difficult activity
D. most difficult activities
答案：B