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Babies should sleep in their mother's bed until they are at least three years old.The controversial advice comes from a paediatrician(儿科专家). The paediatrician found that two-day-old babies who dozed(打瞌睡) on their mother's chest slept better than those who (1) ____ ( place) in cots(幼儿床). Sleeping alone makes (2) ____ harder for mother and child to bond and damages the development of the brain, (3) ____ ( lead) to bad behaviour as the child grows up,researchers fear. Dr Nils Bergman,at the University of Cape Town,South Africa,says that for ideal development,healthy newborns (4) ____ sleep on their mother's chest for the first few weeks.After that,they should stay in the mother's bed (5) ____ they are three or even four years old. Sixteen infants were studied while they slept on their mother's chest and in a cot by her bed.It (6) ____ (reveal) by monitoring that the baby's heart was under three times as (7) ____ (much) stress when he or she slept alone. Being in a cot also affected sleep,with the babies' brains less likely (8) ____ (make) the transition between two types of sleep called active and quiet. In the cots,only six out of the sixteen had any quiet sleep and its quality was far (9) ____ ( bad). Making this transition is thought to be the key (10) ____ the normal development of the brain.

Babies should sleep in their mother's bed until they are at least three years old.The controversial advice comes from a paediatrician(儿科专家).
    The paediatrician found that two-day-old babies who dozed(打瞌睡) on their mother's chest slept better than those who (1) ____ ( place) in cots(幼儿床).
    Sleeping alone makes (2) ____ harder for mother and child to bond and damages the development of the brain, (3) ____  ( lead) to bad behaviour as the child grows up,researchers fear.
    Dr Nils Bergman,at the University of Cape Town,South Africa,says that for ideal development,healthy newborns (4) ____ sleep on their mother's chest for the first few weeks.After that,they should stay in the mother's bed (5) ____ they are three or even four years old.
    Sixteen infants were studied while they slept on their mother's chest and in a cot by her bed.It (6) ____  (reveal) by monitoring that the baby's heart was under three times as (7) ____  (much) stress when he or she slept alone.
    Being in a cot also affected sleep,with the babies' brains less likely (8) ____  (make) the transition between two types of sleep called active and quiet.
    In the cots,only six out of the sixteen had any quiet sleep and its quality was far (9) ____  ( bad).
    Making this transition is thought to be the key (10) ____ the normal development of the brain.

题目解答

答案

(1)考查动词时态语态。句意:这位儿科医生发现,躺在母亲胸前睡眠的两天大婴儿比躺在婴儿床上睡得更好。主句用一般过去时态,可知宾语从句也用一般过去时态描述过去的事情,place和主语之间是被动关系,所以用被动语态,主语who指代的先行词为those,故填were placed。
(2)考查it的用法。句意:研究人员担心,独自睡觉会让母亲和孩子更难亲近,并损害大脑的发育,导致孩子在成长过程中出现不良行为。动词不定式作真正宾语的放在后面,所以用it作形式宾语,故填it。
(3)考查现在分词。句意:研究人员担心,独自睡觉会让母亲和孩子更难亲近,并损害大脑的发育,导致孩子在成长过程中出现不良行为。指代前面句子的直接结果,所以用现在分词作结果状语,故填leading。
(4)考查情态动词。句意:南非开普敦大学的尼尔斯•伯格曼博士说,为了理想的发育,健康的新生儿在最初几周应该睡在母亲的胸前。表示"应该",后跟动词原形,所以用情态动词,故填should。
(5)考查连词。句意:在那之后,他们应该呆在妈妈的床上,直到他们三岁甚至四岁。表示"直到",所以用连词until引导时间状语从句,故填until。
(6)考查动词时态。句意:通过监测发现,当婴儿独自睡觉时,他或她的心脏承受的压力是正常情况下的三倍。宾语从句用一般过去时态,可知描述过去的事情,所以主句也用一般过去时态,故填revealed。
(7)考查固定搭配。句意:通过监测发现,当婴儿独自睡觉时,他或她的心脏承受的压力是正常情况下的三倍。本句为"倍数+as+形容词/副词原级+as"句型,后面的as省略了,故填much。
(8)考查动词不定式。句意:躺在婴儿床上也会影响睡眠,婴儿的大脑不太可能在活跃睡眠和安静睡眠两种睡眠模式之间过渡。be likely to do sth."可能做某事",为固定搭配,故填to make。
(9)考查形容词比较级。句意:在小床上,16个人中只有6个人睡得安稳,而且睡眠质量差得多。前面有修饰比较级的far,所以用形容词比较级作表语,故填worse。
(10)考查介词。句意:实现这种转变被认为是大脑正常发育的关键。the key to"……的关键",为固定搭配,to为介词,故填to。

解析

步骤 1:理解句子结构和时态
- 句子描述的是过去发生的事情,因此使用一般过去时态。
- 句子中包含宾语从句,从句的时态应与主句保持一致。
步骤 2:分析动词时态和语态
- 第一句中,宾语从句的主语是“those”,指代的是“two-day-old babies”,因此使用被动语态。
- 第二句中,动词“make”后接宾语“it”作形式宾语,真正的宾语是“harder for mother and child to bond”。
步骤 3:分析动词形式
- 第三句中,动词“lead”应使用现在分词形式,表示结果。
- 第四句中,情态动词“should”表示建议或推荐。
步骤 4:分析连词和介词
- 第五句中,连词“until”表示“直到”。
- 第六句中,动词“reveal”应使用一般过去时态。
- 第七句中,使用“as much as”表示倍数关系。
- 第八句中,动词“make”应使用动词不定式形式。
- 第九句中,形容词“bad”应使用比较级形式。
- 第十句中,介词“to”表示“到”或“向”。

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