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——Why is the classroom so dirty?——Sorry, Sir. It _____ yesterday. We forgot to do it.
#41937
A
doesn’t clean
B
didn’t clean
C
isn’t cleaned
D
wasn’t cleaned
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推荐题目
I want you _____ a story.   
#42547
A
tells
B
tell
C
to tell
D
told
— Where is your mother?  —She ________ the shop. She’ll be back in an hour.
#39734
A
has been to
B
has gone to
C
goes to
D
go to
It is said that the meeting _______ for a week.
#41750
A
has been ended
B
has lasted
C
has began
D
has been held
Mary ______ in Beijing since 2008.
#39884
A
have lived
B
is lived
C
lived
D
has lived
Please don't stand up in class until you          .
#39211
A
were told to
B
are told to
C
were told
D
are told