When I got there ,I saw some boys _____ on the playground.
#50714
A
playing
B
played
C
to play
D
was waiting
推荐题目
— I tried       it out in this way, but I failed.— Why not       it in some other ways?
#50281
A
to work; try doing
B
to work; try to do
C
working; try to do
D
to work; to try doing
When I returned .I saw him ____ on the bed.
#50772
A
laying
B
lying
C
lay
D
lie
Would you please   me how to do it ? 
#50447
A
tell
B
telling
C
to tell
D
not to tell