阅读理解。
What makes people happier:money or having happy friends and neighbors? Scientists have found
an answer as part of a study.
The new study found that friends of happy people had a greater chance of being happy themselves.
And the smaller the distance between friends,the larger the effect they had on each other's happiness.
For example,a person was 20% more likely to feel happy if a friend who lived within  l. 5 kilometers.
Having a happy neighbor who lived next door increased the chance of being happy by 34%. The effects
of friends' happiness lasted for up to a year.
The scientists found that sadness also spread among friends,but not as much as happiness.
People who take 3 degrees out of' separation still had an effect on a person's happiness.3 degrees
of separation means the friend of a friend of a friend.
The study showed that having an extra 5 ,000 dollars increased a person's chances of becoming
happier by about 2 percent. But the researchers found that the influence of a friend of a friend of a
friend can be greater than that.
1. The effects of happiness from friends ____.
A. have a chance of 20%  to make you happy
B. are usually within l.5km
C. have a chance of 34% to make you happy
D．can last about a year
2. The word "spread" in the fourth paragraph means in China?
A. 传播
B. 流行
C. 分享
D. 兴盛
3. Having a happy friend who lives within one and a half kilometers increases a chance of being
happy by____.
A. 45%
B. 50％
C. 34％
D. 20％
4. Which of the followings has the greatest effect on happiness according to the passage?
A. Money.
B. The friend of a friend.
C. Happy friends who live in another city.
D. Happy neighbors.
5. From this passage we know ____.
A. who's the happiest
B. what's happiness
C. what makes people happier
D. how to make people happy

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