rly a problem, most probably .

a) he is a lazy person

b) he refuses to follow his own energy cycle

c) he is not sure when his energy is low

d) he is at his energy peak in the afternoon or evening

22. which of the following may lead to family quarrels according to the passage?

a) unawareness of energy cycles.

b) familiar monologues.

c) a change in a family member’s energy cycle.

d) attempts to control the energy cycle of other family members.

23. if one wants to work more efficiently at his low point in the morning, he should .

a) change his energy cycle b) overcome his laziness

c) get up earlier than usual d) go to bed earlier

24. you are advised to rise with a yawn and stretch because it will .

a) help to keep your energy for the day’s work

b) help you to control your temper early in the day

c) enable you to concentrate on your routine work

d) keep your energy cycle under control all day

25. which of the following statements is not true?

a) getting off to work with a minimum effort helps save one’s energy.

b) dr. kletman explains why people reach their peaks at different hours of day.

c) habit helps a person adapt to his own energy cycle.

d) children have energy cycles, too.

passage two

questions 26 to 30 are based on the following passage.

where do pesticides fit into the picture of environmental disease? we have seen that they now pollute soil, water, and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. man, however much he may like to pretend the contrary, is part of nature. can he escape a pollution that is now so thoroughly distributed throughout our world?

we know that even single exposures to these chemicals, if the amount is large enough, can cause extremely severe poisoning. but this is not the major problem. the sudden illness or death of farmers, farm workers, and others exposed to sufficient quantities of pesticides are very sad and should not occur. for the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world.

responsible public health officials have pointed out that the biological effects of chemicals are cumulative over long periods of time, and that the danger to the individual may depend on the sum of the exposures received throughout his lifetime. for these very reasons the danger is easily ignored. it is human nature to shake off what may seem to us a threat of future disaster. “men are naturally most impressed by diseases which have obvious signs,” says a wise physician, dr. rene dubos, “yet some of their worst enemies slowly approach them unnoticed.”

26. which of the following is closest in meaning to the sentence “man, …is part of nature.” (line 3-4, para.1)?

a) man appears indifferent to what happens in nature.

b) man acts as if he does not belong to nature.

c) man can avoid the effects of environmental pollution.

d) man can escape his responsibilities for environmental protection.

27. what is the author’s attitude towards the environmental effects of pesticides?

a) pessimistic. b) indifferent. c) defensive. d) concerned.

28. in the author’s view, the sudden death caused by exposure to large amounts of pesticides .

a) is not the worst of the negative consequences resulting from the use of pesticides

b) now occurs most frequently among all accidental deaths

c) has sharply increased so as to become the center of public attention

d) is unavoidable because people can’t do without pesticides in farming

29. people tend to ignore the delayed effects of exposure to chemicals because ______.

a) limited exposure to them does little harm to people’s health

b) the present is more important for them than the future

c) the danger does not become apparent immediately

d) humans are capable of withstanding small amounts of poisoning

30. it can be concluded from dr dubos’ remarks that _______.

a) people find invisible diseases difficult to deal with

b) attacks by hidden enemies tend to be fatal

c) diseases with obvious sighs are easy to cure

d) people tend to overlook hidden dangers caused by pesticides

passage three

questions 31 to 35 are based on the following passage.

oceanography has been defined as “the application of all sciences to the study of the sea”. before the nineteenth century, scientists with an interest in the sea were few and far bet