It is important for us _____ our English. 
#54004
A
improving
B
improved
C
to improve
D
improves
推荐题目
It takes ________ half an hour ________ on my bike.
#58719
A
me; to go home
B
them; to go to home
C
his; going home
D
he; go to home
When something_______ me, I can always go to her.
#61656
A
worried
B
is worried about
C
worries
D
is worrying about