问题
选择题
I often have conversations with John over ______ telephone, while I keep in touch with Tom by ______ letter.
A．/;the
B．/;a
C．the; /
D．the; a
答案
C
题目分析：句意：我经常通过电话和约翰交谈，然而，我和汤姆用书信保持联系。前一个空over the telephone 表示“通过电话”；by letter 表示“通过写信”，by 表示方式后直接接一个名词。选C。