can you tell me when ___to learn English?A.did you start B.have you startd C.you have startdcan you tell me when ___to learn English?A.did you start B.have you startd C.you have startd D.you startd

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can you tell me when ___to learn English?A.did you start B.have you startd C.you have startdcan you tell me when ___to learn English?A.did you start B.have you startd C.you have startd D.you startd
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can you tell me when ___to learn English?A.did you start B.have you startd C.you have startdcan you tell me when ___to learn English?A.did you start B.have you startd C.you have startd D.you startd
can you tell me when ___to learn English?A.did you start B.have you startd C.you have startd
can you tell me when ___to learn English?A.did you start B.have you startd C.you have startd D.you startd

can you tell me when ___to learn English?A.did you start B.have you startd C.you have startdcan you tell me when ___to learn English?A.did you start B.have you startd C.you have startd D.you startd
D you started ( when不能与现在完成时连用,故排除B与C,另外宾语从句的语序是陈述句语序,再排除A)

这个时间是一个延续性的,所以要用现在完成时,且要用一般疑问句,所以选B

B