in the past ,people kept in touch mainly （by letter）对划线部分提问people mainly kept in touch in the past?
问题描述：
in the past ,people kept in touch mainly （by letter）对划线部分提问
people mainly kept in touch in the past?
答
How did people mainly keep in touch in the past?
翻译：
过去人们主要怎样互相联系？
说明：
by letter表示方式，用How提问。
而mainly是限制词，故不能省略。
答
楼主的单词是不是打错了,relative or.这个句子意思是和你的亲戚或朋友保持联系的主要方式是写信. 多和亲戚朋友们写写信保持联系。 通过写信来
答
How did people keep in touch in the past?