he found a number of people already work there为什么要用work

he found a number of people already work there为什么要用work when I got there,I found a number of people (to be)already w There are a lot of people ______(work) there.填什么,为什么? People work there,为什么work不加s? today there are already robots working in factories 为什么用work 选择There is a lot of work _______we will need a lot of people there are already quite a number of firms____ there is\are a number of people... There ----a number of people there.There number of people th (1)He has work there _____(already,just,since) he left schoo He has finished___(do)his work already. a large number of people后面为什么用are