题目内容：

why didn't you give me a ring?Well,I meant -----,but later I forgot A telephoning B to telephone C having telephoned D to have telephoned 要详细的理由

优质解答

D,我打算打电话来着
mean to do 所以排除A和C ,
B应该为to telephone you或只有 to
D的意思是我本来打算要打电话的.过去完成时