Never ______ such a good boss before I came to this company.

It was after he had read the requirements _______ Mr. Black realized the task was too difficult to be finished.

______ the rising rent prices in Wuhan can’t compare with those in Beijing and Guangzhou, they still worry current college students

________ the parents had read his letter ________ the true state of affairs.

How can I pass the exams，Mr Right—Well，you ________ a lot of hard work first.