is the largest crowd i have ever seen这里的It指的是什么 为什么这样用It

It is the largest crowd I have ever seen.该句是定语从句嘛? it is the largest crowd i have ever seen.把ever改成never意思有什么不同? is the largest crowd i have ever seen这里的It指的是什么 为什么这样用It the bus is too_______(CROWD) 关于I have ever seenIt is the largest crowd I have ever seen.I have ever seen在这里是个什么用法?做什么语? 什么is the largest ocean Their job is to excite the crowd. THE SUPEMARKET IS ____(CROWD) ON WEEKENDS The bus is ____(crowd) with students The crowd is going wild.翻译 The red kangaroo is the largest is the largest contindnt of the world Which is the largest number of four? Is it the largest state in area? Which state is the largest in population 1.what is the largest ocean? The largest island in China is ( ) Africa is the second largest continent.