问题
选择题
—Why is the classroom so dirty?
—Sorry, sir. It yesterday. We forgot to do it. [ ]
A. don't clean
B. didn't clean
C. weren't cleaned
D. wasn't cleaned
答案
答案:D
—Why is the classroom so dirty?
—Sorry, sir. It yesterday. We forgot to do it. [ ]
A. don't clean
B. didn't clean
C. weren't cleaned
D. wasn't cleaned
答案:D