At the moment of the sunset, the sky turns _______.
If you can’t trust your friend to have a relationship with another person you consider a friend, it’s a clear ______ of a problem in your friendships.”
The video, Under the Dome, has rapidly pushed the public______about air pollution and encouraged people to join in efforts to make a difference.
It is the superior intelligence and the use of language that distinguish man______ the other animals.
Nowhere else, as Tim’s sister said, ______ except the small garden in the backyard after school.
—What you’ve said sounds___, but can we really solve the problem in that way?—It is worth a try.