The little boy was last seen __________ football by the river.
#48508
A
to play
B
play
C
played
D
playing
推荐题目
It is difficult for the students______  the homework on weekends. 
#49154
A
finish
B
to finish
C
finishing
D
finished
Mike invited me ______ tennis this weekend.
#50605
A
play
B
to play
C
playing
D
played
— He is working hard now.— He tries ___ English. So he practices ___ English every day.
#49653
A
to learn, to speak
B
learning, speak
C
to learn, speaking
D
learning, to speak