Don’t make a noise! They _______on a physics problem now.
#41516
A
will work
B
are working
C
worked
D
have worked
推荐题目
--- Where is Jim? --- He _________ to the museum. He hasn’t come back.
#40022
A
have been
B
have gone
C
has gone
D
has been
---What do you think of my answer to the question?----Sorry, What’s that? I _______ about something else.
#39461
A
am thinking
B
was thinking
C
had thought
D
thought
If it tomorrow, we go to the park.
#41526
A
rains; don’t
B
rains; won’t
C
will rain; won’t
D
will rain; don’t
The writer told us that he________ a great number of short stories in the last few years.
#42024
A
wrote
B
was written
C
has written
D
had written
—Did you meet the professor at the airport?—No，he ____ by the time I ____ there．
#42354
A
had left；got
B
has left；reached
C
was leaving；got
D
left；had got