But speech has to be induced， and this depends on interaction between the mother and the child， where the mother recognizes the signals in the child‘s babbling， grasping and smiling， and responds to them. Insensitivity of the mother to these signals dulls the interaction because the child gets discouraged and sends out only the obvious signals，。 Sensitivity to the child’s non – verbal signals is essential to the growth and development of language.

　　1.The purpose of Frederick I‘s experiment was ____.

　　A.to prove that children are born with ability to speak

　　B.to discover what language a child would speak without hearing any human speak

　　C.to find out what role careful nursing would play in teaching a child to speak

　　D.to prove that a child could be damaged without learning a language

　　2.The reason that some children are backward in speaking is most likely that ____.

　　A.they are incapable of learning language rapidly

　　B.they are exposed to too much language at once

　　C.their mothers respond inadequately to their attempts to speak

　　D.their mothers are not intelligent enough to help them

　　3.What is particularly remarkable about a child is that ____.

　　A.he is born with the capacity to speak

　　B.he has a brain more complex than an animal‘s

　　C.he can produce his own sentences

　　D.he owes his speech ability to good nursing

　　4.Which of the following can be inferred from the passage?

　　A.The faculty of speech is inborn in man.

　　B.The child‘s brain is highly selective.

　　C.Most children learn their language in definite stages.

　　D.All the above

　　5.If a child starts to speak later than others， he will ____in future.

　　A.have a high IQ B.be less intelligent

　　C.be insensitive to verbal signals D.not necessarily be backward

　　答案：BCCDD

　　Racket， din clamor， noise， whatever you want to call it， unwanted sound is America‘s most widespread nuisance. But noise is more than just a nuisance. It constitutes a real and present danger to people’s health. Day and night， at home， at work， and at play， noise can produce serious physical and psychological stress. No one is immune to this stress. Though we seem to adjust to noise by ignoring it， the ear， in fact， never closes and the body still responds—sometimes with extreme tension， as to a strange sound in the night.

　　The annoyance we feel when faced with noise is the most common outward symptom of the stress building up inside us. Indeed， because irritability is so apparent， legislators have made public annoyance the basis of many noise abatement programs. The more subtle and more serious health hazards associated with stress caused by noise traditionally have been given much less attention. Nevertheless， when we are annoyed or made irritable by noise， we should consider these symptoms fair warning that other thing may be happening to us， some of which may be damaging to our health.

　　Of many health hazards to noise， hearing loss is the most clearly observable and measurable by health professionals. The other hazards are harder to pin down. For many of us， there may be a risk that exposure to the stress of noise increases susceptibility to disease and infection. The more susceptible among us may experience noise as a complicating factor in heart problems and other diseases. Noise that causes annoyance and irritability in health persons may have serious consequences for these already ill in mind or body.

　　Noise affects us throughout our lives. For example， there are indications of effects on the unborn child when mothers are exposed to industrial and environmental noise. During infancy and childhood， youngsters exposed to high noise levels may have trouble falling asleep and obtaining necessary amounts of rest.

　　Why， then， is there not greater alarm about these dangers? Perhaps it is because the link between noise and many disabilities or diseases has not yet been conclusively demonstrated. Perhaps it is because we tend to dismiss annoyance as a price to pay for living in the modern world. It may also be because we still think of hearing loss as only an occupational hazard.

　　1.In Paragraph 1， the phrase “immune to” are used to mean ___.

　　A.unaffected by

　　B.hurt by

　　C.unlikely to be seen by

　　D.unknown by

　　2.The author‘s attitude toward noise would best be described as ___. A.unrealistic

　　B.traditional

　　C.concerned

　　D.hysterical

　　3.Which of the following best states the main idea of the passage?

　　A.Noise is a major problem; most people recognize its importance.

　　B.Although noise can be annoying， it is not a major problem.

　　C.Noise is a major problem and has not yet been recognized as such.

　　D.Noise is a major problem about which nothing can be done.

　　4.The author condemns noise essentially because it ___.

　　A.is against the law

　　B.can make some people irritable

　　C.is a nuisance

　　D.in a ganger to people‘s health

　　5.The author would probably consider research about the effects noise has on people to be ___.

　　A.unimportant

　　B.impossible.

　　C.a waste of money

　　D.essential

　　答案：ACCDD