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【题目】阅读下面短文,在空白处填入 1 个适当的单词或括号内单词的正确形式。

In late April 2014, a 1 (violence) storm swept through the southern United States, destroying more than $ 1 billion in property and killing 35 people. But a group of migratory(迁徙的) birds in eastern Tennessee sensed the oncoming mess and left long before the first clouds arrived. A year 2 (early), the team had tagged golden-winged warblers ( ) with leg trackers 3 (study) their annual migrations to South America. Two days before the storms 4 (strike)five golden-winged warblers slipped away, traveling nearly 700 kilometers south to the Florida coast.

It's the first time that the birds which normally migrate with the seasons 5 (observe) to slip away when a big storm hits. The researchers suspect this 6 (behave) occurs only when the threat of injury outweighs the energy costs of a long trip. But nobody knows 7 the birds guessed the storm's severity and left so soon. Puzzled by it, the scientists initially reasoned that delicate changes in weather — atmospheric pressure, temperature, wind speed, cloud cover, or rainfall signaled 8 upcoming disaster. Yet when they checked weather records, none of these factors waved significantly 9 the storm. Instead, the team assumes that the 10 (approach) storms created a disorder of infrasounds—low-frequency sound waves that birds can hear, but humans can't.

【答案】

1violent

2earlier

3to study

4struck

5have been observed

6behavior

7how

8the

9before

10approaching

【解析】

本文是说明文。20144月下旬在一场暴风雨席卷美国南部的时候,科学家之前在腿上戴了跟踪器的5只金翅鹰飞走了。科学家们对鸟儿是如何猜到暴风雨的严重程度这一问题感到疑惑不解。他们认为是即将来临的风暴产生的一种紊乱的低频声波,鸟儿可以听到,而人类却不能。

1考查形容词。句意:20144月下旬,一场猛烈的暴风雨席卷了美国南部。修饰名词storm,应该用形容词;violence是名词, 形容词为violent。故填violent

2考查形容词比较等级。句意:一年前,研究小组给金翅莺戴上了腿部追踪器。根据句意,此处是指与现在相比更早的时间,因此用形容词比较级;early的比较级为earlier。故填earlier

3考查非谓语动词。句意: 一年前,研究小组给金翅莺戴上了腿部追踪器,以研究他们每年向南美的迁徙情况。 分析句子结构,此处用不定式作目的状语,意思为为了…...”。故填to study

4考查时态。句意:风暴袭击前两天,五只金翅莺溜走了。分析句子结构,所填词是谓语动词;全文叙述的是过去的事情,用一般过去时;strike是不规则变化动词,过去式为struck。故填struck

5考查时态和语态。句意: 这是第一次观察到通常随季节迁徙的鸟类在大风暴来袭时会飞走。句型It is the first time that…“这是第一次….”that后的从句用现在完成时;主语the birdsobserve之间是逻辑上的被动关系,因此用现在完成时的被动语态。故填have been observed

6考查名词。句意:研究人员怀疑,这种行为只有在伤害的威胁大于长途旅行的能量消耗时才会发生。分析句子结构,所填词在句子中做主语,应该用名词;behave是动词,名词形式为behavior。故填behavior

7考查从属连词。句意: 但没人知道鸟儿是怎么猜到风暴的严重程度,那么快就离开了。分析句子结构,空后是knows宾语从句,所填词是宾语从句的连接词;根据句意,应该为鸟儿怎样猜测到暴风雨的严重程度,因此用how引导宾语从句。故填how

8考查冠词。句意:科学家们对此感到困惑,他们最初认为是天气的微妙变化—— 压、温度、风速、云量或降雨——预示着这场即将到来的灾难。此处用定冠词the 表示特指,指上文提到的灾难。故填the

9考查介词。句意: 然而,当他们检查天气记录时,这些因素中没有一个在风暴之前发生了明显的波动。上文提到“upcoming disaster(即将到来的灾难)”,根据常理,应该是在暴风雨前没有迹象。 故填before

10考查形容词。句意:相反,该小组认为,即将来临的风暴产生一种不规则的次声低频声波,鸟类可以听到,但人类不能。修饰名词storms,前面应该是定语;approach是动词,用形容词approaching做定语,意思为即将来临的。故填approaching

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