Sometimes, we see some people reading books while biting their nails (咬指甲). According to the BBC(英国广播公司), up to 45 percent of teenagers bit their nails. There is not an exact answer to{#blank#}1{#/blank#}   why people bite their nails. But most commonly, nail biting is said to be a nervous habit. It is done  {#blank#}2{#/blank#}  of stress(压力), boredom or excitement.

 What's more, a report says that people with higher levels of intelligence(智力)  {#blank#}3{#/blank#}  biting their nails at an early age. It believes that compared  {#blank#}4{#/blank#}  common person,  {#blank#}5{#/blank#}   with higher levels of intelligence may feel higher levels of stress more easily.

 This habit is   {#blank#}6{#/blank#}   for the biters. It can give them red or sore fingertips. And long-term nail biting can affect(影响)   {#blank#}7{#/blank#}   nails grow.

 But don't worry! There are many   {#blank#}8{#/blank#}  to stop biting your nails. First, keep your nails clean. The more you focus on taking care of your nails, the  {#blank#}9{#/blank#}   likely you may bite them again. Also, when you feel stressed, try to relax.  {#blank#}10{#/blank#}  exercise or having a warm bath both help.

    Some people like shopping online. They {#blank#}1{#/blank#} clothes, books or computers on it. Like many other clever Chinese, Li Lei is shopping online, too. " My family and I {#blank#}2{#/blank#} to eat tomatoes, broccoli, lettuce and {#blank#}3{#/blank#}, I want to buy organic (有机的) ones," Said Li. "They are {#blank#}4{#/blank#} and I don't have to wash them so many times". Every month, Li Lei {#blank#}5{#/blank#} about 600 Yuan on organic vegetables and meat on online organic shop. There are many people in China {#blank#}6{#/blank#} like Li. They are eating and buying organic food. People buy organic food because they want to be more {#blank#}7{#/blank#}. They also want to know about their food clearly.

A: Tim, let's talk about the future, I think it always makes us excited,

B: I agree with you. What's your prediction about the {#blank#}1{#/blank#}?

A: I think every home will have a car.

B: But I think cars will make more {#blank#}2{#/blank#}.

A: No. Cars in the future will be green ones.

B: Great! Do you think people will have more free time in the future?

A: Yes. That's because there will be more{#blank#}3{#/blank#}. They will help people do some work.

B: I hope so. Do you think it will be more{#blank#}4{#/blank#}in the city?

A: No, I think more people will live in the countryside in the future.

B: Why?

A: Because the air there is very clean. It's good for {#blank#}5{#/blank#}health. More people will care about health.

B: You're right.