He is a key witness in this case.（英译中)

To average people, they often tend to live under the illusion that English often means a good opportunity for one’s career, is this really the case？.（英译中)

There is a page missing in this book.（英译中)

He is a man of some influence in the government circles.（英译中)

He put the key in the lock and turned it.（英译中)

Is he in？（英译中)

He is building a greenhouse in his garden.（英译中)