Section C
1. Rainforests cover 6% of the earth’s surface.
(1)cover 覆盖；
(2) cover… with…, 用…覆盖…,如：He covered his face with a newspaper.
(3) be covered with… 被…覆盖：The land is covered with snow.
2. Thousands and thousands of animals live in rainforests.
thousands of 成千上万的… thousands and thousands of 千千万万的（比前者更多）
2. They also help to control the climate. control the climate 控制气候
4. They can’t live without water.
Without 没有，是介词，后不能接句子，只接名词，动名词或代词。如： I won’t be happy without her.
5. In fact, water makes up the largest part of the human body.
make up 组成，be made up of 由… 组成,
如：Our team is made up of 11 players.
比较：be made of (from )由…制成
6. We must save every drop of water.
save
(1) 节约 save money
(2) 救 save one’s life 救某人的命
drop(1) 动词，掉 A bottle dropped onto the floor.
(2) 名词，滴 a drop of water.
7. Without water, there could be no life on earth.
on earth
(1) = in the world 在世界上
（2）用于疑问词或否定词后，表“究竟，到底”，如：What on earth did you do that for ?
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