题目内容：

Do you often feel lonely? What do you do when you feel that way? Hide yourself away and spend your time reading, watching TV or walking around?

You might think that feeling lonely is just like feeling happy, sad or scared — that it’s just one of your various moods. That is true. However, if you let yourself be lonely for too long without dealing with it, you could be making a serious mistake.

Doctors have known for some time that feeling lonely is bad for the mind. It can lead to mental health problems such as depression, stress and reduce confidence. “Being lonely means not feeling connected or cared for, but it’s not about being mentally alone,” Lisa Jaremka, scientist from Ohio State University, US, told Live Science in January. And there’s growing evidence that not having friends is connected with physical illness as well.

In 2006, for example, scientists studied 2,800 women who had cancer. They found that those who had few friends or family were five times more likely to die of their disease than women with many social contacts. Also, even healthy people had a better chance of falling ill if they felt left out by others, according to the BBC.

The results have scientists thinking that loneliness might hurt the immune system(免疫系统), which protects the body from diseases.

Hoping to prove this theory, Jaremka and her research team put volunteers(志愿者) through a stress test. During the test, volunteers were asked to make an unprepared speech in front of a group of stony-faced people. The researchers found that volunteers who said they were lonely in their daily lives felt more stress during the test. And their blood samples showed that all the stress had managed to cause harmful changes to their immune system.

“Loneliness has been thought of in many ways as a chronic stressor(慢性增压器) — a socially painful situation that can last for quite a long time, ” explained Jaremka, who led the study.

The number of people suffering from loneliness is increasing all over the world. However, solving the problem is easier said than done. It won’t work to just “tell anyone to go out and find someone to love you”, said Jaremka. “We need to create support networks.”

1.If people feel lonely for a long time, ________.

A. they won’t feel happy anymore

B. they are more mentally harmed than physically

C. they will find the feeling goes away by itself

D. they are more likely to fall ill

2.What was the purpose of the stress test carried out by Jaremka’s team?

A. To find out how people fight diseases.

B. To prove loneliness hurts people’s immune systems.

C. To find out the relationship between loneliness and stress.

D. To see how people’s emotions change when they give unprepared speeches.

3.What made scientists think loneliness might make the body worse at fighting diseases?

A. Growing evidence of mental problems related to loneliness.

B. Some research results about the relationship between cancer and loneliness.

C. Some studies showing that people suffering from loneliness fell ill or died more easily than those who didn’t.

D. The result of a test where volunteers were asked to make an unprepared speech.

4.We can conclude from the article that ________.

A. loneliness has become the No. 1 killer in the world

B. loneliness is increasing due to advanced technologies

C. websites must be set up to help people deal with loneliness

D. much more work needs to be done to fight loneliness