I used to spend a lot of time ________ computer games. 
#48949
A
to play
B
play
C
playing
D
played
推荐题目
____ is good _______ your health.
#50846
A
Walk, to
B
Walking, to
C
To walk , with
D
Walking, for
I hear the birds _______.
#51349
A
sing
B
to sing
C
sings
D
singing
—Would you mind _______ in the classroom?—Sorry, I won’t do that again. 
#49774
A
not running
B
don’t run
C
not to run
D
to not run