we exchanged our email address so that we could keep touch with each other later.
问题描述:
we exchanged our email address so that we could keep touch with each other later.
这个句中应该改什么?要不要把 could 改成can
答
address应该用复数addresses
后面 keep (in)touch with 少个in,其中一处是打印错误吗?不是本来就是那样的也有那样的结构表示和。。。保持联系