He’s trained hard for the last two years. It is ______ he did so well at the track and field meet yesterday.
People are paying more and more attention to the environment _____ they live.
Chang’e-3 made China become the third nation _____ an unmanned spacecraft on the moon.
— Could you do me a favor to take this book to John? — _____
By the time the storm ended, more than 200 people in that area _____.
The police ________ the prisoner to see if he had a gun.