问题
选择题
单项选择。
Are you ready ping-pong? [ ]
A. learning
B. to learn
C. learned
D. learn
答案
答案：B
搜题请搜索小程序“爱下问搜题”
单项选择。
Are you ready ping-pong? [ ]
A. learning
B. to learn
C. learned
D. learn
答案：B