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
He used _______ in Beijing, but he lives in Shandong now.
#58099
A
to live
B
to living
C
live
D
Living
         of the surface of the earth          covered with water.
#53609
A
Seven-tens...are
B
Seven-tens…is
C
Seven-tenths...is
D
Seven-tenths...are