题干
It's 3:30 p. m. Kangkang and his classmates are busy _____ basketball on the playground.
A：playing
B：to play
C：play
D：played
答案(点此获取答案解析）
A
It's 3:30 p. m. Kangkang and his classmates are busy _____ basketball on the playground.
A：playing
B：to play
C：play
D：played
