If he ________harder , he will catch up with us soon .
#38550
A
study
B
studies
C
will study
D
studied
推荐题目
Great changes______ in the city since1970.
#37282
A
have been taken place
B
have taken place.
C
has taken place
D
took place
 His father           Beijing. He is staying there for two days.
#39906
A
is leaving
B
is leaving for
C
is going
D
is
While Ann ___ TV, her father came home.
#41786
A
is watching
B
was watching
C
watch
D
watches