Question

【题目】They are football. ( )

A. play B. playing C. to play

Answer 1

【答案】B

【解析】

句意：他们正在......足球。被+现在分词，构成现在进行时，这里用动词的现在分词。A选项是动词原形；B选项是现在分词；C选项是动词不定式。故答案为：B。