Beijing has struggled with smog for years，which has__________ the sun and affected the health and quality of life of millions.

While intelligent people can often ______ the complex, a fool is more likely to complicate the simple.

Ten minutes had been made full ____ of ____ the problem.

They were very ________ when they heard the ________ news that he would come back in two days.

You see, she’s losing her temper now. Let’s ______ her ________.