There are many people on the bus and it’s ( c )速回速

问题补充：

There are many people on the bus,and it’s ( c )速回速回

答案：

crowded.

======以下答案可供参考======

供参考答案1:

crowd供参考答案2:

crowded

供参考答案3:

There are many people on the bus, and it’s ( crowded )