has made ______ clear to the world that in the course of its development it seeks for both golden, silver hills and clean water, green mountains as well.

ys children have to takearts, music and sports classes in their free time ____ busy schoolwork.

Teenagers should be allowed______ their own clothes.

Everyone in my family _________ TV.

Jack, could you help me ________ these pictures on the blackboard It may help us know more about the hazy weather. (雾霾) — With pleasure.