----She looks tired. ----Yes, she _________ for about twelve hours a day. 
#44485
A
works
B
working
C
work
D
is working
推荐题目
The sick boy ____________ to hospital by the police yesterday.
#44521
A
is taken
B
was taken
C
takes
D
took
Stamps are usually used _____letters.
#44752
A
to sending
B
to send
C
for send
D
for sent
You have to stay behind if your homework         before five o'clock.
#44375
A
wasn’t done
B
hasn’t done
C
doesn't do
D
isn't done
 —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