nomenon

9. graph 10. per

Answer keys for Ex.2 on Page 28:

The first graph shows the global _______________ between ________ and _________The temperature __________ and decreased over this period but on the whole it _________ by around _________ and its highest in 2000. There was a steady _________________ in the temperature during the twenty years after 1980. We can see from the graph that the earth has become ___________ since early last century.

The second graph shows the amount of ______________in the atmosphere from ________ to _______ .The carbon dioxide __________ steadily over this forty-year period. It went up from 315 to 370 parts ___________million.

Keys：

Temperature；1860；2000；increased；rose；1910；increase/rise；warmer

carbon dioxide；1957；1997；increase/ went up；per

Step2 Grammar

强调句结构

常考的强调句结构是it 引导的句子。

一、It is (was) 被强调部分+ that (who) + 句子其他部分。此结构