2018-2019人教新目标高中英语选修六课件:Unit 4 Period 1
2018-2019人教新目标高中英语选修六课件:Unit 4 Period 1第5页

4. The problem begins when we add huge _________ (大量的)of extra carbon dioxide into the atmosphere. 5. It means that more heat energy _____ (倾向)to be trapped in the atmosphere causing the global temperature to go up.

quantities

tends