(2013·凉山一模)Life is like riding a bicycle. ________ your balance, you must keep moving.
#89279
A
Keeping
B
To keep
C
Keep
D
Being kept
推荐题目
Those _____ to go to the exhibition should inform the office.
#98591
A
not wanting
B
who not want
C
not wanted
D
are not want
Is this man ________ you want to have _________ the radio for me?
#95235
A
who; repaired
B
the one; repair
C
that; repair
D
whom; repairing
Isn't it time you got down to        the papers?
#90430
A
mark
B
be marked
C
being marked
D
marking