-when ___ you ___ my brother?-last year.A.have;seen B.did;see C.will;see D.do;see

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-when ___ you ___ my brother?-last year.A.have;seen B.did;see C.will;see D.do;see
-when ___ you ___ my brother?-last year.
A.have;seen B.did;see C.will;see D.do;see

-when ___ you ___ my brother?-last year.A.have;seen B.did;see C.will;see D.do;see
B.did;see

选B,本题考点是过去时的用法,助动词用did,动词恢复原型,所以选B.