long has he been away?-( )A.2 hours before B.since 2 hours C.2 hours ago D.for 2 hours

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longhashebeenaway?-()A.2hoursbeforeB.since2hoursC.2hoursagoD.for2hourslonghashebeenaway?-()A.2hoursb

long has he been away?-( )A.2 hours before B.since 2 hours C.2 hours ago D.for 2 hours
long has he been away?-( )
A.2 hours before B.since 2 hours C.2 hours ago D.for 2 hours

long has he been away?-( )A.2 hours before B.since 2 hours C.2 hours ago D.for 2 hours
选D.for 2 hours
完成时态中时间 for接时间段,since接时间点.

填D。for hours

D 应该吧

D.for 2 hours 提问时完成时,回答用时间段,不用时间点。

D完成时态,用for+时间回答