—Why is the classroom so dirty?—Sorry，sir. It yesterday, We forgot to do it.

—Why is the classroom so dirty?—Sorry，sir. It       yesterday, We forgot to do it.

#39874

doesn’t clean

didn’t clean

isn’t cleaned

wasn’t cleaned

推荐题目

While I _______ down the street, I _______ my classmates.

#41817

was walking; met

walked; met

was walking; was meeting

walked; was meeting

What         you         at this time yesterday?

#41896

do, do

have, done

were, doing

are, doing

Great changes         in China since 1978.

#39803

took place

has happened

have taken place

happened

This morning, when I walked by, I saw many children ____ in the park.

#42558

played

play

playing

to play

Sanya is a beautiful city. I          there twice.

#40680

have gone

have been

have gone to

have been to

共2675题