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
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
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jeff在哪？我不确定，他可能在操场踢足球，选b“可能”