We will find it difficult to know what are our limitations and problems.
我这里用are对吗？
We will find it difficult to know what are our limitations and problems.
我这里用are对吗？
【答】这里用are是正确的。由于这里的 what 是表语，our limitations and problems 是主语。
假如 what 是主语，what 的意思是“the thing which ... ”，谓语动词用单数。如：What you need is a holiday . 你需要的是度假。（摘自《朗文多功能英汉双解词典》第五版）