三.Reading Comprehension

　　Each passage is followed by several questions. For each question there are four suggested answers marked A, B, C and D. Choose one best answer for each question.

　　Directions:

　　For each blank in the following passage, there are four choices given below and marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.

　　Smoking, which may be a pleasure for some people, is a serious source of discomfort for their fellows. _01_, medical authorities express their concern about the effect of smoking _02_ the health not only of those who smoke but also of those who do not. In fact, non-smokers who must involuntarily inhale (吸入) the air _03_ by tobacco smoke may suffer more than the smokers _04_.

　　Smoking is prohibited in the theatres and in halls used for showing films _05_ in laboratories _06_ there may be a fire hazard (危险). Elsewhere, it is up to your good _07_.

　　I am _08_ asking you to maintain “No-Smoking” in classrooms and seminar rooms.

　　This will prove that you have the _09_ health in mind, which is very important to a large _10_ of our students.

　　01 ( B )A. Still B. Further C. More D. Again

　　02 ( C )A. in B. to C. on D. with

　　03 ( C )A. polluting B. be polluted C. polluted D. to be polluted

　　04 ( B )A. them B. themselves C. their own D. they

　　05 ( C )A. and B. but C. as well as D. also

　　06 ( A )A. where B. which C. that D. how

　　07 ( B )A. feeling B. sense C. realize D. think

　　08 ( C )A. so B. next C. therefore D. and

　　09 ( B )A. non-smokers B. non-smokers’ C. non-smoker’s D. non-smoker

　　10 ( A )A. number B. amount C. many D. much

　　When water is heated until it boils， bubbles of gas appear and rise through the hot liquid. When an electric current passes through water in a process called electrolysis (电解)， bubbles of gas appear and rise through the liquid. Superficially (表面地)， the two events appear same.

　　If the gas from the boiling water is examined， its properties are found to be the same as those of the water， Thus， if the steam is cooled to room temperature， a liquid is formed which is indistinguishable from the original water. When， however， the gas from the electrolysis equipment is cooled to room temperature， it remains a gas rather than becoming a liquid. Nor will it， at zero degrees centigrade or below， turn to solid， as will the gas from boiling water， These two processes， boiling and electrolysis， have clearly resulted in products with quite different properties.

　　In boiling， the gas does not represent a new substance， but only a different state of the original substance. Electrolysis， on the other hand， has generated a product which is a new substance， or possibly a mixture of new substances. A change in state as represented by going from a liquid to a gas without the production of new substances in called a “physical change”。 However， when a process takes place that produces new substances， this is called a “chemical change” or a “chemical reaction”。 In a chemical reaction， the initial substances are replaced by a new set of substances or products.

　　1、 ( B )Which of the following is the best title for this passage?

　　A. Electrolysis

　　B. Physical and Chemical Changes

　　C. Different Types of Water

　　D. Water Temperatures

　　2、 ( A )At a temperature slightly above zero degrees centigrade， which of the following is true of gas produced by electrolysis?

　　A. It does not become liquid.

　　B. It cannot be distinguished from water.

　　C. It becomes a solid.

　　D. It expands greatly.

　　3、 ( B )The passage is developed in the way of ________.

　　A. argumentation

　　B. narration

　　C. comparison

　　D. listing examples

　　It was January 1848. A man was digging near the small village of San Francisco， California， Suddenly， he saw something shiny—gold.

　　By the next year the California gold rush had begun. Thousands of men came to California. They were called “forty-miners” after the year 1849. The forty-miners came from all around the USA. They even came from other countries， including Mexico， Australia， China， France， and England. They left their families and jobs， and made the difficult trip to California. They all shared a dream. They all wanted to make a fortune in gold.

　　Towns and camps grew quickly wherever gold was found. These towns were rough places. There was almost always a saloon， where the men drank whiskey and gambled at cards. In mining towns， men stole and sometimes killed for gold.

　　Did the miners make their fortune? Some did， especially those who came early were lucky. In 1848， miners usually made about twenty dollars a day. In 1852 miners made about six dollars a day. Many other people came to California to make money from the miners. Prices were very high. A loaf of bread， which cost five cents in New York， cost almost a dollar in San Francisco.

　　In 1848 San Francisco had been a village. Six years later it was a city with a population of 50，000. In 1850 California had enough people to become a state.

　　1、 ( B )In 1849 thousands of men came to California because _______.

　　A. they were forty-miners

　　B. they wanted to find gold

　　C. they had families

　　D. California was a beautiful place

　　2、 ( D )Towns and camps _________.

　　A. grew quickly

　　B. grew where there was a saloon

　　C. grew where there was no gold

　　D. grew fast wherever there was gold

　　3、 ( B )Some of the miners who were lucky _________.

　　A. made twenty dollars

　　B. made their fortune

　　C. made bread

　　D. became poor

　　4、 ( A )The towns of the old West were rough places ________.

　　A. where people fought a lot

　　B. where there are mountains

　　C. where there is no water

　　D. with irregular land