Are,Jake and Peter brother borthers?

问题描述:

Are,Jake and Peter brother borthers?
Yes,___of___study in No.1 Middle School.
A.all,them B.all,they C.both,them D.both,they

选C.2者之间用both 3者以上才用all."of"介词后面一般跟宾格所以是them