Question

【题目】—There are some boys ______ basketball over there.
—Let's go and join them.
A.are playing
B.playing
C.to play

Answer 1

【答案】B
【解析】句意：那边有一些男孩在打篮球。-让我们去加入他们吧。该题目选B，play与boys之间是主动关系，现在分词短语作后置定语。故选B。