The old man was seen _______ in the park at 7:00 a.m. yesterday.
#60522
A
exercise
B
exercised
C
to exercise
D
exercising
推荐题目
 —— I feel tired and sleepy.          ——Why not _______?
#54796
A
to stop to work
B
stop to have a rest
C
stop having a rest
D
to stop to have a rest
Our teachers always tell us        fast when we go to or from school.
#54660
A
not ride
B
don’t ride
C
to not ride
D
not to ride