The old man ____ down by a truck is being saved now. 
#90780
A
knocking
B
to knock
C
knocked
D
being knocked
推荐题目
He studied hard, __________ the exam.
#93042
A
aim at
B
aiming at passing
C
aiming passing
D
aiming to passing
 International communications have led to ________.
#89253
A
using English widely.
B
English having used widely.
C
English to be used widely.
D
English being used widely
I can’t pretend ________ happy when I am not.
#88649
A
to be
B
to have been
C
being
D
having been