题目内容

The naughty boy was muddy because he _______ soccer in the rain all afternoon.

A. has been playing B. had played

C. had been playing D. was playing

C

【解析】

试题分析:考查动词时态辨析。句意:那个顽皮的还在一身泥因为他整个下午都在雨中踢足球了。A现在完成进行时;B过去完成时;C过去完成进行时;D过去进行时,完成进行时表一段时间里持续不间断的进行某动作,本句结果是过去时,原因也应该用过去时故选B。

考点:考查动词时态辨析

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In Western countries people have been using the installment (按揭)plan since the first half of the twentieth century. Today, a large number of families in Great Britain buy furniture, household goods and cars by installments .In the U.S., the figure is much higher than in Great Britain, and people there spend over 10 percent of their income on the installment plan.

The price of an article bought on installments is always higher than the price that would be paid by cash. There is a charge for interest. The buyers pays one quarter or one third of the price as a down payment when the goods are delivered to him. He then makes regular payments, weekly or monthly, until the full price is paid up. The legal ownership of the goods remains with the seller until the final payment has been made.

Installment buying has advantages and disadvantages. It can help couples with small incomes to furnish their homes and start housekeeping, It increases the demand for goods, and in this way helps business and employment. There is ,however, the danger that when business is bad, installment buying may end suddenly, making business much worse. This may result in a great increase in unemployment. If the people on the installment plan lose their jobs, they will probably not be able to make their payments. If great numbers of people are not able to pay their installment debts there is a possibility that businessmen cannot collect their debts and will therefore lose money. If businessmen lose money or fail to make a satisfactory profit, it becomes more likely to have a depression. This is why, in some countries, the government controls the installment plan by fixing the amount of the down payment to discourage people from buying more than they can pay for on the installment plan.

1.Which of the following is true about the installment plan?

A.British families just use the installment plan to buy furniture.

B.More than 10 precent American families buy things on installment.

C.Americans spend more on installment buying than British people do.

D.The payment of installment buying is easier than buying by cash.

2.Goods bought on installments are more expensive than goods bought by cash because_________.

A.the buyer has to pay extra money as interest

B.the delivery of the goods charges extra money

C.the buyer has to pay a down payment

D.The service offered by installment plan charged extra money

3.What will happen to a buyer if he fails to make the full payment for an item bought on installments?

A.He might lose his job

B. He will stop owning the item he has bought

C. He will have to sell what he has bought

D. He will go into debt

4.The advantages of installment buying might include all the followings EXCEPT that _________.

A.purchasing power is strengthened

B.Employment might be increased

C.People develop a good habit of saving money

D.Young couples are able to furnish their homes

5.In some countries, the government controls the installment plan to_________.

A.increase employment

B. avoid depressions

C.ensure that businesses make good profits

D. ensure that people can pay for what they buy

American researchers have discovered that human brains and sleep patterns are confused by devices(装置) that give out bright lights. Electronics, such as laptops, mislead our minds into thinking that it is still daytime, preventing sleep and increasing the risk of insomnia.

Sleep experts say human's natural body clock begins to rest and relax from the day between 9 and 10 pm but the use of computers confuses it.

A person's brain biologically becomes awake when the sun is out because bright light after dark causes the brain to stop producing the hormone (荷尔蒙) called melatonin that makes us sleepy.

Researchers say blue light from devices such as iPads, which is expected to become a popular reading tool when it comes out later this month, is particularly disruptive (干扰的)during the night when the brain thinks it should be dark.

Experts say a good book is a far better way of resting the brain and ensuring a good night's sleep because the bedside lamp(灯) light doesn't affect the brain as it does not look straight into a person's eyes.

“Potentially, yes, if you're using an iPad or a laptop close to bedtime... that light can be stimulating (刺激) to the brain to make it more awake and delay your ability to sleep,” Phyllis Zee, a professor at Northwestern University and director of the school's Centre for Sleep & Circadian Biology, told CNN.

“And I think more importantly, it could also be enough to affect your circadian (昼夜节律的) rhythm. This is the clock in your brain that determines when you sleep and when you wake up. ”

Alon Avidan, associate director of the Sleep Disorders Center at the University of California Los Angeles, added, “I wish people would just take a boring book — an oldfashioned book — and read by a lamp.”

1.The underlined word “insomnia” in the first paragraph probably means “________”.

A.being unable to eat properly

B.brain injury

C.being unable to fall sleep

D.lack of energy

2.Melatonin is the hormone that ________.

A.makes us sleepy

B.helps us relaxed

C.prevents us from waking up

D.makes us excited

3.The bedside lamp light doesn't affect the brain because ________.

A.it doesn't give out blue light

B.it's not as bright as your laptop

C.it doesn't enter your eyes directly

D.it is adjustable

4.We can conclude from the passage that ________.

A.one who uses his laptop often before bedtime can have his body clock disturbed

B.using a laptop before bedtime is more harmful than using an iPad

C.we'd better not do anything before going to bed

D.the best time to go to bed is before 9 pm

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