题目内容：

    Would you buy a car that released calming smells into the air when you are stuck in heavy traffic? Would you buy a robot that smells like a human being?

Many people have seen the 3-D computer-made environments of virtual (虚拟的) reality (VR). Now these virtual worlds will not just look and sound real. Researchers have created VR environments that even smell like the real things. With the new technology, users open a virtual door and step into a new environment, like a rainforest. After they enter this virtual world, special equipment releases forest-like smells into the air to make the experience seem more real.

Suzanne Fisher-Murray said, ＂It is a really wonderful experience that you have because you, re-exploring this environment and you have smells with it.＂

In the United States, Smell-O-Vision was designed to provide smells during the showing of a movie. The Smell-O-Vision system was once popular in the 1960s. Now, Emanuela Maggioni says it is close to becoming popular again. ＂The connection with emotions, memories, and ... the sense of smell,＂ Maggioni said. ＂It is unbelievable what we can do with technology.＂

The uses for smell technology are not just limited to films and the performing arts. Researchers showed a computer program where users could imagine themselves driving a car. The system included a special smell- spraying machine. Dmitrijs Dmitrenko said, ＂We want to deliver the smell of lavender (薫衣草) every time the person drives over the speed limit. We choose lavender because it’s a very calming smell.＂

Scientists are experimenting with smell instead of sounds or image-based alerts on telecommunications equipment. And businesses are already using smell to influence people’s behavior. ＂Not only...in stores…But on the other side, you can create and stimulate (刺激) immediate buying,＂ Maggioni said. ＂So you’re in a library and you smell coffee and actually you are unconsciously having the need to drink a coffee.＂

1.What can researchers make VR environments do by using smell technology?

A. Have a smell of a rainforest. B. Even smell like real ones.

C. Look like a 4-D environment. D. Impress people with a virtual world.

2.The example of Smell-O-Vision proves that ____________.

A. America is the first to use smell technology

B. cinemas are the most suitable for smell sense

C. smell technology has been tried before

D. it was out of date to use smell-spraying devices

3.How is smell technology used by businessmen?

A. To make buyers understand salesmen better.

B. To remind people of their unrealistic buying.

C. To help customers choose their favorite goods.

D. To encourage people to buy something.

4.What is the main idea of the passage?

A. The developments of smell technology.

B. A major breakthrough of smell technology.

C. The sense of smell in human communication.

D. The advanced smell-spraying machines.