If you become rich,you will have a difficult time knowing ( ) your real friends are.A that B who C which
问题描述：
If you become rich,you will have a difficult time knowing ( ) your real friends are.
A that B who C which
答
选B
翻译：如果你变得有钱了，你将很难知道你真正的朋友是谁。
who your real friends are是宾语从句，that引导宾语从句时不能在从句中充当成分，which的意思不符合。
答
B who
答
B
答
B 宾语从句， who指代your real friends 的具体内容
答
你要看后面的从句中缺少什么成分,“your real friends are.”可见有主语your real friends,有系动词are,没有表语,这个表语可以是形容词可以是名词,所以在三个选项中B最适合.
答
B
首先这个句子很明显是一个定语从句，从句中语序发生了改变，所以A排除。从句主语是人，which指代物或事，因此选择B