问题
选择题
______ you ______ the window ? Yes, I am. [ ]
A. Do, clean
B. Is, cleaning
C. Are, cleaning
答案
答案：C
搜题请搜索小程序“爱下问搜题”
______ you ______ the window ? Yes, I am. [ ]
A. Do, clean
B. Is, cleaning
C. Are, cleaning
答案：C