Question

11．It's not hard to find drugs，and sometimes it may seem like everyone's doing them-or wanting you to do them．But as with anything that seems too good to be true，there are downsides to taking drugs．
How Drugs Work
Drugs are chem icals that change the way our bodies work．Some are medicines that help people when doctors prescribe（开处方） them．Many have no medical use or benefits．
When taken，drugs find their way into the bloodstream．From there，they're sent to the brain and other parts of the b ody．In the br ain，drugs may strengthen or weaken the senses，change how alert or sleepy people feel，and sometimes decrease physical pain．
Because of the way drugs work on the brain，they affect the ability to make healthy choices and decisions．Even drinking makes people more likely to get involved in dangerous situations，like driving under the influence or having unprotected sex．
How drugs affect people depends on lots of things：
●the kind of drug taken
●how much is taken
●how often someone uses it
●how quickly it gets to the brain
●what other drugs，food，or substances are taken at the same time
●the person's body size，shape，and chemistry
Although substances can feel good at first，they can do a lot of harm to the body and brain．Drinking alcohol，smoking or using tobacco，taking illegal drugs，even sniffing glue all damage the human body．
8．Which of the following can replace"downsides"？B
A．benefits        B．disadvantages         C．effects      D．changes
9．Which is wrong about drugs？B
A．Drugs change how our body works．
B．Many drugs have no medical benefits．
C．All drugs may help people decrease physical pain．
D．Drugs affect people's ability to make healthy decisions．
10．According to the passage，all the things about drugs exceptAaffect people．
A．who prescribes them
B．the types of drugs taken
C．the food to take with drugs
D．the amount of drugs taken
11．What's the main idea of the passage？B
A．Finding drugs are not hard．
B．The way drugs work．
C．Things that contribute to how drugs affect people．
D．Taking drugs are not always good to people．

Answer 1

分析 文章讲了毒品是怎么发挥作用的，以及影响毒品作用的因素，除了一些情况下治病外，它们更多会给人们带来危害．

解答 8．B．词义判断题．由句意可知，药物还会有导致吸毒的风险，这是缺点，disadvantages，故选B．
9．B．理解判断题．由第二段Some are medicines that help people when doctors prescribe（开处方） them，可知毒品在医生正确应用的时候是有益的，B选项错误，故选B．
10．A．理解判断题．由How drugs affect people depends on lots of things中包含的点可知只有A项没有提到，故选A．
11．B．主旨归纳题．由文意可知，文章讲了毒品是怎么发挥作用的，以及影响毒品作用的因素，因此可知文章讲述了毒品是怎么生效的，故选B．

点评 关于科教类阅读中的一些专业词语或生词，考生要学会略过某些对阅读影响不大的词．如果必须要弄清它的意思，则可以根据词形进行判断，或者从该词在句子中的功用以及与其他词语之间的关系猜测生词的意思．也可根据上下文和其他词语的按时猜测生词的含义．