问题
选择题
— Mike! What are you doing there?
— Listen, Mum! Can you hear somebody _____ upstairs? [ ]
A. go
B. going
C. to go
答案
答案：B
搜题请搜索小程序“爱下问搜题”
— Mike! What are you doing there?
— Listen, Mum! Can you hear somebody _____ upstairs? [ ]
A. go
B. going
C. to go
答案：B