Tony is busy _______ his homework.
#50470
A
doing
B
do
C
to do
D
does
推荐题目
The police warned the children __________the football in the street.
#50675
A
don’t play
B
not play
C
to not play
D
not to play
She spent a lot of time _________the fire that day.
#50622
A
to put out
B
putting out
C
to put on
D
putting on
