题目内容：

There are stock markets (股票市场) in large cities in many countries. Stock markets in Paris, London, Tokyo, Shanghai and New York are among the largest and most well-known. The stock, also called stock exchange,  is a place where people can buy or sell shares of a factory or  company. And each share means certain ownership(所有权) of a factory or company.

Different people go to stock markets. Some are rich, who want to get more money than they have. Others are not very rich, who buy stocks to try to become rich. Still others buy stocks as part of their plan to save money.

Of course, investing (投资) money in the stock market is not the safest way to make money. No one can tell exactly whether the shares will be doing well. The factory or company may do badly. Then the stocks will go down, and the investors will lose money. The stock may go up or down for a number of untold reasons. Everyone wants the stock to go up, but sometimes even if a factory or company does a good job, the stock may still go down.

Going to the stock market is often like gambling (赌博). All want to make money by “gambling’ in the stock market. Factories and companies that need money are pleased that so many people are ready to “gamble”. Indeed, the stock market is an attractive(吸引人的) but complex part of the business world.

1.If you are a good investor, ________ in the stock market.

A.you can always make money

B.you can tell exactly when the stock goes up or down

C.you may sometimes lose money

D.your gambling is always safe

2.The passage mainly wants to tell us________.

A.how to buy or sell shares

B.the stock market is like gambling

C.a general idea of stock market

D.investing money in the stock market is not the safest way

3.Factories and companies are pleased that so many people “gamble” because________.

A.they can make them rich

B.they need their money to do business

C.they need more people to work for them

D.some people win and some lose

4.The word “complex” in the last sentence probably means________.

A.difficult B.happy

C.complete D.modern