题干

I often have conversations with John over ______ telephone, while keep in touch with Tom by ______ letter.
A.不填;theB.不填;a
C.the;不填D.the; a
上一题 下一题 0.64难度 单项选择 更新时间:2014-01-10 09:06:21

答案(点此获取答案解析)