He went there some books and call on an old friend of his.A. boughtB. buyingC. buyD. to

问题补充：

He went there, some books and call on an old friend of his.A. boughtB. buyingC. buyD. to buy

答案：

and call on暗示与前面的形式必须一致。而He went there暗示去的目的，所以用不定式作目的状语，与（to）call on并列。