问题
选择题
Listen! The boy ________ in the room. [ ]
A. sings
B. singing
C. is singing
D. to sing
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Listen! The boy ________ in the room. [ ]
A. sings
B. singing
C. is singing
D. to sing
答案：C