【解析】根据下文“With great difficulty, he sat down on the floor next to Bill and worshipped with him.”可知，老人将他的拐杖扔在地上，然后坐在Bill的旁边，和他一起做礼拜。

　　19．【答案】A

　　【解析】句意：教堂所有的人激动得声音哽咽。choke up with意为“哽咽”。

　　20．【答案】C

　　【解析】根据上文“you will never remember.”可知，这里是你们永远不会忘记你们看见的事情。remember意为“记住”，adopt“采用，采纳”，forget“忘记”，admire“钦佩”。

　　.阅读理解

　　(2016陕西西安第七十中学11月检测，B)

　　The predictability(可预见性)of our mortality(死亡) rates is something that has long puzzled social scientists.After all, there is no natural reason why 2,500 people should accidentally shoot themselves each year or why 7,000 should drown or 55,000 die in their cars.No one establishes a fixed number for each type of death.It just happens that they follow a consistent pattern year after year.

　　A few years ago a Canadian psychologist named Gerald Wilde became interested in this phenomenon.He noticed that mortality rates for violent and accidental deaths throughout the Western world have remained the same throughout the whole of the century, despite all the technological advances and increases in safety standards that have happened in that time.Wilde developed a theory called “risk homeostasis”．According to this theory, people naturally live with a certain level of risk.When something is made safer, people will get around the measure in some way to go back to the original level of danger.If, for instance, they are required to wear seat belts, they will feel safer and thus will drive faster, thereby canceling out(抵消)the benefits that the seat belt provides.It appears that we have an innate(天生的)need for danger.

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