问题
选择题
—What are you doing?
—__________. [ ]
A. I sing
B. I'm singing
C. I can sing
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—What are you doing?
—__________. [ ]
A. I sing
B. I'm singing
C. I can sing
答案：B