---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
—Smoking _________in the cinema. Please stop _________. —Sorry, I won’t.
#44571
A
is allowed; smoking
B
allows; to smoke
C
isn’t allowed; smoking
D
isn’t allowed; to smoke
Personal computers ______ in 1976. It has changed the whole world.
#44711
A
have invented
B
were invented
C
is invented
D
invented
- Do you think that she will finish the job on time? - Sure. If she_______ to do it in her own way.
#44602
A
leaves
B
is left
C
is leaving
D
has left
The 6th Car Exhibition ______ at Nanjing International Expo Center on April 28, 2013.
#44663
A
holds
B
held
C
was held
D
will be held
— Dad, may I go out with my friends? — Unless your homework .
#44465
A
has been finished
B
has finished
C
finishes
D
will finish