---Why is the classroom so dirty? --- Sorry, sir. It ______ yesterday. We forgot to do it.
#44831
A
doesn’t clean
B
didn’t clean
C
isn’t cleaned
D
wasn’t cleaned
推荐题目
--When _____ the abacus _____? -- In the sixth century by the Chinese people.
#44867
A
is, invented
B
did, invent
C
was, invented
D
does, invent
—Many tourists ________to the Great Wall every year.—Yes, that’s true.
#44726
A
attract
B
have attracted
C
are attracting
D
are attracted
Because of the ________ of her pet dog, Jenny was so sad and cried for a long time.
#44516
A
die
B
death
C
dead
D
dying
—I usually watch TV till 11 o’clock in the evening.—Really ? Are you __________?
#44891
A
allowed to stay up
B
allow to stay up
C
allowing staying up
D
allowed stay up
---Mum, may I go out to play football this afternoon? ---You can if your homework .
#44800
A
is done
B
will do
C
has done
D
will be done