_____ hard and you’ll succeed sooner or later.
#59339
A
Study
B
To study
C
Studying
D
Studied
推荐题目
 ________ at the door before you enter my room, please.
#66075
A
Knock
B
Knocking
C
Knocked
D
To knock
______ some housework can make your mother_______.
#59454
A
Doing; happy
B
Making ; happy
C
Doing; happily
D
Making ; happily
___he gave that we should take more exercise in our spare time! 
#66283
A
What a good advice
B
How a good advice
C
What good advice
D
How good advice