if I --------- mr.jones was in the hospital,i ---------------him a note and some flowers.A knew,would send B had known,would have sent C knew,would have sent D had known,would sed 各位朋友们应该选那个那

Question

if I --------- mr.jones was in the hospital,i ---------------him a note and some flowers.
A knew,would send B had known,would have sent C knew,would have sent D had known,would sed 各位朋友们应该选那个那

Answer 1

选C
这是条件状语从句,主句是过去式,从句用过去完成时.