人教版高中英语必修二Unit4 Wildlife protection全解
（含练习和答案）
Ⅰ. 常考单词必背
1．decrease vi.&vt. 减少；(使)变小或变少
They are making every effort to decrease the production cost.
他们正尽力降低生产成本。
[快速闪记]
(1)decrease to... 减少到……
decrease by... 减少了……
decrease from...to... 从……减少到……
(2)on the decrease 在减少中
2．loss n. 损失；遗失；丧失
He was at a loss for words.
他不知该说些什么。
[快速闪记]
lose v. 失去；输掉，失败
3. hunt vt.&vi.打猎；猎取；搜寻
We've been hunting for the car keys for the last half hour.
过去的半小时里，我们一直在找汽车钥匙。
[快速闪记]
hunt for sb/sth 寻找某人/物
hunt after 追逐，追求
hunt down 追捕，缉拿
4．respond vi. 回答；响应；做出反应
He always responds to my questions without any patience.
他总是很不耐烦地回答我的问题。
[快速闪记]
(1)respond to... 回应……；对……做出反应
respond by doing sth 以某种方式回应
(2)response n. 响应；回答
5．relief n. (痛苦或忧虑的)减轻或解除；减轻痛苦的事物
It was a relief to be able to talk to someone about it. 能和别人谈谈这件事，感到舒心多了。
[快速闪记]
(1)in relief 如释重负；松了口气
to one's relief 令人感到欣慰的是
(2)relieve vt.减轻；缓解；消除
relieved adj.宽慰的；不再忧虑的
6．mercy n. 仁慈；宽恕；怜悯
It's a mercy she wasn't seriously hurt.
很幸运她伤得不重。
[快速闪记]
(1)show mercy to 怜悯某人
have mercy on 对……表示怜悯
at the mercy of 任凭……的摆布；在……的支配中
without mercy 残忍地，毫无同情心地
(2)merciful adj.仁慈的；宽大的
7. certain adj.确定的；某一；一定
I was certain that he had seen me.
我肯定他已经看见我了。
[快速闪记]
(1)be certain of/about... 对……有把握，确信……
be certain to do sth 确定做某事
make certain of/about/that... 确定某事
It is certain that... 一定能……
for certain＝for sure 确定无疑地，准确地
(2)certainly adv.当然，确定
certainty n. 确定，必然的事
8. appreciate vt. 鉴赏；感激；意识到
He said he would appreciate it if you could give him a hand.
他说要是你能帮他的忙，他会非常感激。
[快速闪记]
(1)appreciate (one's) doing... 感激(某人)做某事
would appreciate it if... 要是……将不胜感激
(2)appreciation n. 欣赏；鉴别；感激
9. succeed vi.成功vt.接替；继任
I'm sure you'll succeed if you work hard.
你只要努力，我肯定你会成功的。
[快速闪记]
(1)succeed in (doing) sth 成功完成某事
succeed to sth 继承……
(2)success n. 成功
successful adj. 成功的
successfully adv. 圆满地；顺利地；成功地
10. harm n.&vt. 损害；危害
Modern farming method does great harm to the countryside.
现代的耕作方式对乡村造成了很大的损害。
[快速闪记]
(1)do harm to 伤害
there is no harm in (one's) doing sth＝it does no harm (for sb) to do sth (某人)做某事并无害处
(2)harmful adj. 有害的
harmless adj. 无害的
Ⅱ. 高频短语必会
1．die out 灭亡；逐渐消失
This kind of bird is dying out.
这种鸟行将灭绝。
[快速闪记]
(1)die of 因……而死(一般指死于内因，如疾病、饥饿、情感原因等)
