3.physical activity：体力活动
4.Hot weather also increases dangers for people who must take medicine for high blood pressure…：炎热天气对于那些必须服药以控制血压的人……也增力n-J"危险性。
练习：
A Such persons have a weak or damaged heart, high blood pressure, or other problems of the blood system.
B Several of these conditions are present at the same time.
C Most people suffer only muscle pain as a result of heat stress.
D Several hot days are considered a heat wave.
E So does extreme heat.
F Doctors say people can do many things to protect themselves from the dangers of extreme heat.
答案与题解：
1.E本文的标题是Heat Is Killer，通篇文章说的是heat的危害性及预防方法。“空l”前面的句子说，“Floods，storms，volcano eruptions and other natural events kill thousands of people every year”，“空l”后面的句子说，“…heat may be nature’s deadliest killer”。将两个句子所表达的意思汇总来看，floods，storms，volcano eruptions和高温都是杀手，而以高温更烈。“空l”的句子一定与“杀手”有关。五个选项中只有+E符合这个条件，所以E是答案。
2.D“空2”后面的句子说到heat waves，而选项D的句子中也出现heat wave，说明这两个句子意思上有联系。“空2”的句子是对“heat wave”下定义，为下一句的展开作了铺垫。D是答案。
3.F第一段末尾说，热浪期间，当黑夜与白天温差不大，对人体伤害很大。第二段就列举了许多保护自己免受高温伤害的方法。“空3”的句子应该是位于段首的概括句。选项F说人们有多种办法保护自己，完全符合要求，因此是答案。
4.C紧跟“空4”后面句子中有特指的the pain，说明前文一定出现过pain这个词。选项C的句子中有pain，且C的句子填人后，上下文意思连贯，所以是答案。
5.A“空5”前面的句子说：某些人在热浪期间特别危险。读者或许会问，是哪些人呢?选项A回答了这个问题，所以是答案。
Musical Training Can Improve Communication Skills
American scientists say musical training seems to improve communication skills and language retardation. They found that developing musical skills involves the same process in the brain as learning how to speak. The scientists believe that1 could help children with learning disabilities.
1 . She says musical training involves putting together different kinds of information, such as hearing music, looking at musical notes, touching an instrument and watching other musicians. This process is not much
