Thetask was challenging, but laborers were proud of their work.
Ona wall in Khufu's Great Pyramid, for example, a group of workers wrote
"Friendsof Khufu.". "It's because they were not just building the tomb oftheir King."
SaysEgyptian archeologist Zahi Hawass. "They were building Egypt.
Itwas a national project, and everyone joined the activity."
It'sbecause they were 中的it 具体是指的什么呢？
另外， joined the activity 还是应该是 joined in the activity 呀
it 指代 The task was challenging, but laborers were proud of theirwork.这句话的内容。
join：to take part in something that somebody else is doing
join something Over200 members of staff joined the strike.
Members of the public joined the search for themissing boy.
join somebody in doing something I'm sure you'll all join me in wishing Ted and Laura a veryhappy marriage.
以上为《牛津》词典内容。
所以，你觉得join不可以直接接something作宾语，要用join insomething, 这种认识是片面的。
