问题
选择题
They are practicing ________ now. You can wait here. [ ]
A. swimming
B. going swimming
C. to go swimming
D. to swim
答案
答案：A
搜题请搜索小程序“爱下问搜题”
They are practicing ________ now. You can wait here. [ ]
A. swimming
B. going swimming
C. to go swimming
D. to swim
答案：A
