听问句，选择正确的答句。
（）1. A. They can prevent floods and landslides.
B. They can cause earthquakes.
C. They can make the soil weaker.
（）2. A. People had more clean water.
B. People lost fresh air.
C. People became richer.
（）3. A. By saving paper.
B. By cutting down trees.
C. By selling wood.
（）4. A. Because trees make the soil stronger.
B. Because trees can cause typhoons.
C. Because trees take away water.

1. A 2. B 3. A 4. A

读一读，选择正确的单词或词组补全句子。
1. On a hot summer day, trees help (cool down / warm up) the air around us.
2. People (plant / cut down) too many trees to make paper and furniture.
3. Forests (give / take away) homes to many animals like birds and squirrels.
4. Trees use (water / sunlight) to make their own food.
5. We should protect the Earth by (planting / cutting down) more trees and reducing pollution.
6. People are (poorer / poor) than before.
7. People cut down trees to sell (food / wood).
8. After (visit / visiting) some poor places, she saw many problems.

1. cool down 2. cut down 3. give 4. sunlight 5. planting 6. poorer 7. wood 8. visiting

【分析】做此类选词填空题，需先明确句子语境，再辨析括号内单词或词组的词义，同时结合语法规则（如介词后接动名词、形容词比较级的标志词than）确定正确选项。具体思路：1. 结合夏天树的作用选对应短语；2. 结合砍树制作物品的语境选短语；3. 结合森林与动物栖息地的关系选动词；4. 结合树制造食物的原料选名词；5. 结合保护地球的语境和介词用法选动名词；6. 结合比较级标志词选形容词形式；7. 结合砍树售卖的物品选名词；8. 结合介词用法选动名词。
【解析】1. 句意：炎热的夏天，树木帮助我们周围的空气降温。cool down意为“降温”，warm up意为“升温”，符合语境的是cool down；2. 句意：人们砍太多树来制作纸和家具。cut down意为“砍倒”，plant意为“种植”，符合语境的是cut down；3. 句意：森林给许多动物（如鸟类、松鼠）提供家园。give意为“给予”，take away意为“带走”，符合语境的是give；4. 句意：树木用阳光制造自身所需的食物。water意为“水”，sunlight意为“阳光”，符合语境的是sunlight；5. 句意：我们应该通过种更多树和减少污染来保护地球。介词by后需接动名词，且“种树”符合保护地球的语境，故选planting；6. 句意：人们比以前更穷。than是比较级标志词，需用形容词比较级，poorer是poor的比较级，故选poorer；7. 句意：人们砍树来售卖木材。food意为“食物”，wood意为“木材”，符合语境的是wood；8. 句意：参观完一些贫困地区后，她发现了很多问题。介词after后需接动名词，visit的动名词形式是visiting，故选visiting。
【答案】1. cool down 2. cut down 3. give 4. sunlight 5. planting 6. poorer 7. wood 8. visiting
【知识点】英语词汇辨析、形容词比较级、介词用法
【点评】本题为基础英语选词填空题，主要考查常用词汇、短语的词义理解及基础语法（介词后接动名词、形容词比较级）的运用，结合语境即可轻松作答，属于英语学习中的基础题型。
【难度系数】0.3