题干
（2016•恩施州）- There are some boys ______ basketball over there.
- Let's go and join them.
A：are playing
B：playing
C：to play
答案(点此获取答案解析）
B
（2016•恩施州）- There are some boys ______ basketball over there.
- Let's go and join them.
A：are playing
B：playing
C：to play
。下列关于该物质的说法中正确的是( )