Unit 19
Text A Animals at Risk： Who Cares？
搭配：
1.Keep pace with 跟上步伐
2.Compete with 与谁竞争
3.Threat to sb./sth. 对某人或某事构成威胁
4.Be claim to be 声称
5.Be concerned about 对什么感到很担心
6.Look after 照顾
7.Be armed with 装备
语言点：
1.An animal species becomes（虽然species是以s结尾，但此处该词跟在冠次an后，还是单数，所以谓语become用了单数） extinct when it fails to produce enough young in each generation to keep pace with the death rate.
2.Better-adapted 更能适应环境的
3.A number of examples can be given of the way in which（定于从句之所以用in which，是因为in the way表示以某种方式） natural environments are being rapidly changed.
4.Likelihood 可能性
5.Because表示因为是连词，后面应该接句子；because of 表示因为是介词短语，后加名词或代词。
6.Provided（that）+从句，表示如果
7.There is great pleasure in watching wildlife in natural or near-natural environments.
Text B The killer Smogs
搭配：
1.Be filled with 充满
2.Be caused by 由什么引起的
3.Turn into 转变成
4.Combine sth./sb. with 把什么结合在一起
5.Be blown away 被吹走
6.Be due to sb./sth./doing sth. 因为
7.Breath in 呼进
语言点：
1.Fog（n.雾）-foggy（adj.雾的）
2.The first reported event 第一个被报道的事
3.Older people with lung or heart diseases were hit（受害最重/受打击最重） hardest.
4.Deadly 致命的
5.Bad的最高级worst
6.The polluted air 被污染的空气
7.Affect（v.影响）