They      _ the train until it disappeared in the distance.
#52422
A
saw
B
watched
C
noticed
D
realized
推荐题目
She prefers ________at the party rather than______.
#54638
A
to sing; dance
B
to sing ; dancing
C
sing; to dance
D
sing ;dance
What do you ______________the transportation in your city?
#59730
A
think up
B
think out
C
think of
D
think over