There is no ________ in going to the cinema now as the film has already started.

Which of the following is NOT the cause for the current jump of oil prices according to the passage?

A．U.S. economy recovers.

B．China's economy is developing fast.

C．The rest of the world is becoming rich.

D．The supply of oil is becoming less and less.

Which of the following is NOT true according to the passage?

A. There is no popularity that really counts.

B. Many parents think that their children are challenging their authority.

C. It is not necessarily bad for a teenager to disagree with his or her classmates.

D. Most teenagers are actually doing the same.

There is no point ______ with him, since he has already made up his mind.

A．argue

B．to argue

C．in arguing

D．of arguing

There is evidence that man is changing, ______.

A．he has been growing taller over the past 500 years

B．he has got stronger eyes than he ever had

C．his hair is getting thinner and thinner

D．his limbs are getting weaker because he tends to make less use of them

There is no question that the old style. of air pollution could kill people. In one week following the infamous "peasouper" fog in December 1952, 4, 700 people died in London. Most of these people were elderly and already had heart or lung diseases. A series of these killer fogs eventually led to the British Parliament passing the Clean Air Act which restricted the burning of coal.

Fortunately the effect of smog on the lungs is not so dramatic. Scientists have now conducted a number of laboratory experiments in which volunteers are exposed to ozone inside a steel chamber for a few hours. Even at quite low concentrations there is a reversible fall in lung function, an increase in the irritability of the lungs and evidence of airway inflammation (发炎). Although irritable and inflamed lungs are particularly seen in people with asthma (哮喘) and other lung diseases, these effects of ozone also occur in healthy subjects. Similar changes are also seen after exposure to nitrogen dioxide, although there is some disagreement about the concentration at which they occur.

Other studies have found that people living in areas with high levels of pollution have more symptoms and worse lung function than those living in areas with clean air. Groups of children attending school camps show falls in lung function even at quite low concentrations of ozone. There is also a relationship between ozone levels and hospital admissions for asthma, both in North America and Australia. It is suspected that long-term exposure to smog may result in chronic bronchitis (支气管炎) and emphysema (肺气肿), but this has yet to be proven.

Recently an association has been found between the levels of particles in the air and death rates in North American cities. The reason for this association is not understood and as yet there is no evidence this occurs in Australia. However, we do know that hazy days are associated with more asthma attacks in children.

Which of the following is NOT the result of laboratory experiments?

A．Low concentrations

B．Fall in lung function

C．Irritability of the lungs

D．Air way inflammation

Which of the following is NOT true according to the passage?

A. There is no popularity that really counts.

B. Many parents think that their children are challenging their authority.

C. It is not necessarily bad for a teenager to disagree with his or her classmates.

D. Most teenagers are actually doing the same.

Which of the following is NOT true-according to the passage?

A．There is no popularity that really counts.

B．Many parents think that their children are challenging their authority.

C．It is not necessarily bad for a teenager to disagree with his or her classmates.

D．Most teenagers are actually doing the same.

According to the passage, which of the following was probably true about copper in the colonies?

A．The copper used by colonists was not effective in conducting heat.

B．The copper items created by colonial coppersmiths were not skillfully made.

C．There were no local copper mines from which copper could be obtained.

D．The copper there is not proper to be made into embellishments.