where's jeff i'm not sure .he__ be playing football on the playground .A.need B.might C.must D.can

where's jeff i'm not sure .he__ be playing football on the playground .
A.need B.might C.must D.can

B
这从 i'm not sure “我不敢肯定” 可推知
请在客户端右上角评价点“满意”即可,

jeff在哪？我不确定，他可能在操场踢足球，选b“可能”