Our teacher told us that light _____ much faster than sound.
#41507
A
traveled
B
travels
C
is traveling
D
was traveling
推荐题目
The scientists ________ on the new medicine for two years. They will succeed in no time.
#38384
A
work
B
are working
C
have worked
D
will work
–Where is Mr. Zhang? –He _________ for two days. Can I give him a message?
#39601
A
left
B
has left
C
has been away
D
leaves
Don’t make a noise! They _______on a physics problem now.
#41516
A
will work
B
are working
C
worked
D
have worked
This morning, when I walked by, I saw many children ____ in the park.
#42558
A
played
B
play
C
playing
D
to play
It’s four o’clock in the afternoon. The boys __ in the pool.
#41532
A
is swiming
B
are swiming
C
are swimming
D
is swimming