When I returned to my study, I found the floor thoroughly ____ and all my books ____ according to the types of books.
The reason why I didn't go to Shanghai was ________ a new job.
________ makes mistakes must correct them.
"Is Mary from New York City " "I don't know _______."
His success was because of ________ he had been working hard.
Although he didn’t expect _______ me here, he advised _______ to the nearest restaurant.