问题补充：
— Why is your bedroom so dirty?
— Sorry, Mum. It . I felt very tired after playing soccer.
A. isn’t cleaned
B. didn’t clean
C. doesn’t clean
D. wasn’t cleaned
答案：
A. isn’t cleaned
B. didn’t clean
C. doesn’t clean
D. wasn’t cleaned
解析：考查动词的时态与语态。句意：为什么你卧室那么脏？对不起，妈妈，没有打扫。今天下午踢完足球后，感到很累。It代指your bedroom，与打扫之间是被动关系，故选D项。
考点 :考查动词的时态与语态
