Our government has tried many ways to _________ the smog haze(雾霾) problem. Maybe we’ll have a clearer sky in the near future.

Would you please buy me a bright paperpackage when you go shopping-

Mo Yan won the Nobel Prize in 2012. Many fans areeagerly waiting for his new novel to ______.

Mountain climbing _______ be tiring and many people feel sick as the atmosphere gets thinner.

Mr Wu made Daniel ____ his homework after school. This made him very _____.