Question

1. Bob is said        in a company for only 3 weeks,but I am not sure what company he worked in. (work)

据说Bob在一个公司已经工作三周了，但我不知道是什么公司。

Answer 1

1. to have worked此处不定式的完成式表示动作已完成，从后面的"worked"可知动作已经完成。