Nowadays, many people walk to work ________ Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.

We like Mr Wu because he sometimes _________ us interesting stories in his class.

Scientists are increasely _____ that the earth is getting hotter because of carbon dioxide and other gases.

The young man made a ______to his parents thathe would try to earn his own living after graduation.

I thought you were proud of the coat I ________.— I’m afraid notYou’d better change it for another[ ]