Are Bil and Mary your friends.A.yes,they are B.they are c.yes,they're D.they,aren't
问题描述：
Are Bil and Mary your friends.A.yes,they are B.they are c.yes,they're D.they,aren't
只有一个正确答案只能选一个
答
A...一般疑问句回答,没啥好说的c可以吗C不行吧，感觉They‘re后面必须加点什么，我也不确定啦。。。中国英语教育越来越奇葩了