-- did he send this letter to you? ---By mailA. WhichB. WhyC. WhatD. How

发布时间：2020-08-15 01:41:31

--     did he send this letter to you?  ---By mail
A. Which
B. Why
C. What
D. How

网友回答

A. Which
B. Why
C. What
(答案→)D. How
解析：从答话中的by mail可知这是表示方式，所以选how。
以上问题属网友观点，不代表本站立场，仅供参考！