】阅读《塑料瓶装水真的干净吗》完成下面题目（7分）
①出门在外，口渴的时候我们都习惯买一瓶水喝，瓶装水给我们的印象是干净和方便，尤其是高档瓶装水都会标榜自己“出身清白”，“从未受到过人类污染”。例如,“王岛云雨”产自澳大利亚塔斯马尼亚岛,那里号称拥有世界上“最干净的空气”,雨水自然清洁无比；“公元前1万年”产自号称“地球上最古老的水源”——加拿大卑诗省沿岸的冰川，水质更是纯正无比。然而，科学家指出，塑料瓶装水也有可能“不干净”。
②英国化学研究人员威廉·肖迪克表示，装饮用水的塑料瓶生产过程就有污染隐患，因为在制造瓶子的过程中，会使用含有锑元素的化合物作催化剂，随着塑料瓶的成型，锑元素也进入了塑料中。塑料瓶可能会持续向瓶中的水溶解重金属元素锑,这种元素长期积聚在体内可能危害健康。威廉·肖迪克对当地的15种热销瓶装水进行化学检验，结果发现天然地下水中的锑含量是万亿分之一，而刚出厂的瓶装水的锑含量平均为万亿分之一百六十。时间越长，塑料瓶中的锑元素在水中的溶解量越大，这个过程就像泡茶一样。出厂3个月后，瓶装水中的锑元素的含量竟然增加了一倍。然而，现在市场上大多数瓶装水包装上注明的保质期大多是24个月。另外，温度越高，锑元素在水中的溶解量越大，而人们对瓶装水需求量较大的季节是温度高的夏天。肖迪克表示，虽然摄入极少量的锑元素不会导致人生病，但是大量摄入则会诱发呕吐，甚至可能致命。
③美国哈佛大学的研究人员米歇尔等人发现，不少塑料瓶在加工过程中会加入名为“双酚A”（BPA）的化学物质。这种化学物质与出生缺陷、发育问题、心脏病和糖尿病患病风险高有关联。专家对它可能对人体健康造成的影响表示担忧，而一些国家已将该物质正式列为有毒物质。
④此外，荷兰研究者发现，瓶装矿泉水经常被细菌和真菌污染，污染的瓶装矿泉水对健康个体致病的危险可能有限，但对于免疫功能低下的病人和婴儿，则有更高的感染危险。
⑤英国“水与环境管理协会”的执行主席尼克·里夫斯还表示，瓶装水对环境的污染也不容忽视。全世界每年用于制造塑料瓶的塑料为270万吨，这些塑料的原料大多是从石油中提取的，仅在美国，制造这些塑料瓶就要消耗150万桶石油，这些石油可以供10万辆汽车使用一年。86%的塑料水瓶最后都变成了垃圾，需要400年至1000年才能降解。这些塑料垃圾在燃烧时会产生有毒气体和含有重金属的灰烬。
（摘自2011年5月《知识就是力量》，略有删改）
A.随着温度增高，时间增加，塑料瓶中的锑元素在水中溶解量会越大。
B.重金属元素锑一旦被人体摄入，就会诱发呕吐，甚至可能致命。
C.全世界每年用于制造塑料瓶的塑料为270万吨，这些塑料的原料大多是从石油中提取的。
D.专家认为，在塑料瓶加工过程中所加入的名为“双酚A”（BPA）的化学物质可能对人体健康造成影响。
【小题1】下列句中划线词语能否删去？为什么（4分）
(1)出厂3个月后，瓶装水中的锑元素的含量竟然增加了一倍。
(2)瓶装矿泉水经常被细菌和真菌污染，污染的瓶装矿泉水对健康个体致病的危险可能有限，

                                 
Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries slowly.
　You probably know how to ride a bike safely. Now learn to use a computer safely.
Your eyes
　Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.
　When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes.
Your hands and wrists (手腕)
　　Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows (肘部） at the same height as the keyboard. 3) Stop something and exercise your hands, wrists and fingers in a different way.
Your back
　　Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.
　Enjoy your computer, but use it safely.
【小题1】A computer screen may injure your eyes if __________.

A．you sit 60 centimeters away	B．you remember to look away
C．your eyes are too close to it	D．the window is on your left or your right

【小题2】 Hand and wrist injuries are caused when you _________.

A．get plenty of exercise	B．move in the same way again and again
C．rest your wrists on something	D．keep your elbows as high as the keyboard

【小题3】Your eyes and hands will be safe if __________.

A．you work near a window	B．you often take a rest from working
C．you use a keyboard for a long time	D．the window is behind you

【小题4】It is good for your back and neck if you sit __________.

A．in the right way	B．for many hours
C．with the screen below your eyes	D．with your back leaning forward

【小题5】 What would be the best title for the passage?

A．How to protect your eyes	B．How to protect your hands and wrists
C．How to use a computer safely	D．How to protect your back

Father is sleeping . You’d better __________ quiet .

A. to keep B. keep C. keeping D.not keep

 

Everyone needs friends. There is an old saying “Friends are God's way of taking care of us.” But how do you find real friendship and keep it?

The American writer Sally Seamans tells young students some smart ways to find friends. Sally says finding friendship is just like planting a tree. You plant the seed and take care of it to make it grow.

First, you should choose a friend. What makes a good friend? It is not because a person has money or good looks. A good friend should be kind and patient. For example, if you have a bad day, a good friend should listen to your complaints and do his or her best to help. To make a friend, you can not be too shy. You should make each other happy and share your lives. But things cannot always be happy. Even the best have fights. What should you do when you have a fight with your friend? You have to talk to him or her. When there is no one around, have an honest talk. If he or she doesn't want to talk, you could write a letter.

There are three steps to being friends again:

Tell him or her how you are feeling ; say what your friend has done wrong, and explain why you did this or that. Remember that friendship is the most important thing in your life.

1.Sally wants to tell students the ways to ________.

A．find friends        B．plant trees         C．get happy         D．keep fit

2.What makes good friends? A good friend should ________.

A．be lovely and cool                       B．be kind and patient

C．have lots of money                      D．have good looks

3.Accroding to the text, you can ________ your friend after a fight.

A．buy a present for

B．never say a word to

C．have dinner with

D．write a letter to

4.What is the best title of the text?

A．Teenagers and friendship

B．The good friends around you

C．The trouble of growing up

D．The care and keeping of friends

 

Rent(出租)a room

Spare room? Not only will a lodger (房客) earn you some money, but also, thanks to the government-backed “rent a room” program, you won’t have to pay any tax (税) on the first ￡4,500 you make per year. Try advertising your room on Roomspare or Roommateeasy.

Make money during special events

Don’t want a full-time lodger? Then rent on a short-term basis (基础). If you live in the capital, renting a room out during the Olympics or other big events could bring in money. Grashpadder can advertise your space.

Use your roof (屋顶)

You need the right kind of roof, but some energy companies pay the cost of fixing solar equipment (around￡14,000), and let you use the energy produced for nothing. In return, they get paid for unused energy fed back into the National Grid. However, you have to sign a 25-year agreement with the supplier (供应商), which could prevent you from changing the roof. 

1.If you earn ￡5,000 from renting a room in one year, the tax you need to pay will be based on ________.

A．￡300            B．￡500            C．￡4,500           D．￡5,000

2.If you want to use energy free, you have to ________.

A．sign an agreement with the government

B．pay around ￡14,000 for the equipment

C．sell the roof to some energy companies

D．keep the roof unchanged for within 25 years

3.Who would most like to read the passage?

A．Lodgers.                              B．Advertisers.

C．House owners.                         D．Online companies.