I don't know when he ___________ to work in that small village,perhaps last year.A.was sent     B.will be sent C.has been sent D.sent 选哪一个?具体说明~

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Idon''tknowwhenhe___________toworkinthatsmallvillage,perhapslastyear.A.wassent    B.willbesentC.hasbe

I don't know when he ___________ to work in that small village,perhaps last year.A.was sent     B.will be sent C.has been sent D.sent 选哪一个?具体说明~
I don't know when he ___________ to work in that small village,perhaps last year.
A.was sent     B.will be sent C.has been sent D.sent
选哪一个?具体说明~

I don't know when he ___________ to work in that small village,perhaps last year.A.was sent     B.will be sent C.has been sent D.sent 选哪一个?具体说明~
应该是A
我不知道他何时被派到这个小村庄工作的,也许是去年
last year,所以说明发生在过去,要用过去式,所以BC不
他是被派来工作的,要用被动,所以A