题目内容：

Internet dating has become one of the biggest and most successful business ventures on the Internet.Basically，Internet dating is a way to meet people for either friendship or dating without actually having to meet them in person first.

The first thing to do if you decide to try Internet dating is to build your profile (简介) which can include your hobbies，hopes for the future，and so on.A photograph is optional，but many sites claim that a photograph increases the number of people who look at your profile.Many Internet dating sites will charge a one­time registration fee to use their services.

Internet dating makes it possible to meet people from all over the world.Your call even narrow the search down to your area by zip code (邮政编码)．Another advantage is that you can communicate by e­mail before you meet in person.Thousands of people have met，fallen in love，and married through Internet dating.It is an excellent way for shy people to meet.It is also a way for people with busy lives to connect with others，and an easy way to meet people who share your interests.

Just as in conventional dating and love，there are some pitfalls to be aware of in Internet dating.The person you have been talking to on the Net may not be who they say they are.Be very aware that there are some people who misrepresent their appearance or private details，such as marital status，income，and so on，for their own reasons.It would not be the first time that someone has been taken in，and talk shows are full of cheating partners who have been caught dating over the Internet in their spare time.Nevertheless，taking a few simple precautions (防范措施) should help ensure that your Internet dating experience is fun.

1.The purpose of writing the passage is to________.

A．persuade readers to go dating on the Internet

B．inform us how to date on the Internet

C．warn readers against web love

D．introduce Internet dating to us

2.Which of the following is a must to make an Internet dating possible?

A．A photo.  B．A profile.

C．Registration fee.  D．Business experience.

3.The underlined word “pitfalls” in Paragraph 4 most probably means________.

A．rules  B．trends

C．problems  D．skills

4.What is probably talked about following the last paragraph?

A．Conventional dating.  B．Hidden advantages.

C．Safety measures.  D．Romantic love.