Part 1课前预习设计
自读课文 疏通文脉大意
Task 1文本整体理解：理清文章架构
1.What does the text mainly tell us?
A．Some polar bears died of starvation.
B．What the greenhouse effect is.
C．Global warming has caused some disasters and we must pay attention to it.
D．How the polar bears find food.
2．Match the main idea with each part.
Para.1 ______ A．We need to do something to
reduce greenhouse gas emissions.
Para.2 ______ B．The rise in temperature has
caused natural disasters.
Para.3 ______ C．Earth is getting warmer and
warmer.
Para.4 ______ D．A dead polar bear was found,
which alarmed some experts.
Para.5 ______ E．Why is Earth getting warmer
and warmer？
