people是单数还是复数

　　Many local people believe the development will profit them.

　　当地的许多人认为，这项开发将对他们有利。

　　It's good to meet people from different parts of the country.

　　结识来自这个国家不同地区的.人是有益的。

　　People tend to work hard at this stage of life.

　　人在这个人生阶段往往发奋努力。

　　There were more than 50 people on stage in one scene.

　　有一场戏中舞台上的人有50多个。

　　People often give very different accounts of the same event.

　　人们常常对同一件事的叙述大为不同。