—What should I do, doctor?   —______healthy, you should take more exercise.
#50576
A
To keep
B
Keep
C
Keeping
D
Kept
推荐题目
I couldn’t wait _____ the box as soon as I received the gift.
#49148
A
to open
B
open
C
opening
D
for opening
The policeman asked the girls ______ play in the street.
#49778
A
to not
B
not to
C
didn’t
D
not
--- Tom is one of _________ students in my class . --- Yes . He usually prefers _________ at home to playing outside . 
#49381
A
the most hard-working , studying
B
more hard-working , to study
C
the most hard-working , to study
D
more hard-working , studying
There is a bird        in the sky.
#50711
A
fly
B
flying
C
flies
D
to fly
Would you like _______ some milk?
#49421
A
have
B
to have
C
having
D
Has