听音频，回答下列问题： The investigation was dangerous because_____

专八

单选题听音频，回答下列问题：
The investigation was dangerous because______

A．the mine was badly damaged
B．the ventilation system was broken
C．the mine was too deep
D．the safety facility was destroyed

参考答案：B进入在线模考

本题的出题点在转折处(but)，题干的核心词是the investigation和dangerous。新闻提到，爆炸造成了地下通风系统损坏，使得调查工作异常危险，故选B。
Newsltem3
【听力原文】
Scientists in the US have created a new strain ofmosquito that's resistant to malaria，meaning it can't then pass the disease onto humans．

Scientists say this is a key step on a long joumey towards fighting the disease with genetically modified mosquitoes．The researchers used a single genetic tweak to interfere with the production of a molecule in the insect's gut．Previous studies have attempted a similar approach，

This rendered the insect unable to spread the disease．The ultimate aim is to release these malaria—resistant mosquitoes into the wild，but scientists will first need to work on more genetic trickery to give their insects a competitive advantage over their disease spreading counterparts．
【听前预测】
根据题于和选项中出现的mosquit0、scientists等可以判断新闻报道了与科学家对蚊子的研究有关的事件。
【新闻摘要】
美国科学家通过对蚊子进行基因改造，使其不能够将疟疾传染给人类。新闻提到，这是科学家首次能够完全阻止疟原虫在蚊子体内发育，但是距离科学家把这种蚊子投放到野外还有一段时间，因为科学家们需要让这种蚊子比普通蚊子更具有竞争优势。
【试题解析】

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1 Questions 9 to 10 are based on the following news． At the end of the news item, you will be given 20 seconds to answer the questions． Now listen to the news．
The development of__ inside the mosquito has been blocked．

A．molecule in the gut
B．genetic gene
C．malaria parasite
D．disease-spreading tissue

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2 Which of the following description is INCORRECT?

A．The new strain of mosquito has been released into the wild
B．Scientists have done similar researches before．
C．The new strain of mosquito cannot spread the disease．
D．This kind of mosquito is genetically modified

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3回答题
TEXT A
　　High in a smooth ocean of sky floated a dazzling, majestic sun． Fragments of powdery cloud, like spray flung from a wave crest, sprinkled the radiant, lake-blue heaven．
　　Relaxed on a bundle of hay in a corner of a meadow bathed in sunlight, Paul lay dreaming． A gentle breeze was stirring the surrounding hedges; bees moved, humming thoughtfully, from scarlet poppy to purple thistle; a distant lark, invisible in blue light, was flooding the vast realm of the sky with glorious song, as the sun was flooding the earth with brilliance． Beyond the hedge a brook tinkled over softly-glowing pebbles． Butterflies hovered above nodding clover． An ant was busily exploring the uncharted territory of Paul's suntanned wrist． A grasshopper skidded briskly over his ankle． And the blazing sun was steadily scorching his fair freckled face to bright lobster red． Neither sun, nor grasshopper, nor ant, however, was able to arouse him．
　　Not even when a fly started crawling over his face did he open his eyes． For Paul was a thousand miles away,in a world of eternal snow and ice． Across the towering mountain range, a bitter gale was screaming furiously as with one hand he gripped a projecting knob of rock while with his axe he hacked out the next narrow foothold in the rock． As their infallible guide, he was leading his gallant party of climbers up a treacherous, vertical wall of rock towards the lofty peak above, hitherto unconquered by man． A single slip, however trivial, would probably
result in death for all of them． To his right he could glimpse the furrowed glacier sweeping towards the valley, but he was far too absorbed in his task to appreciate fully the scene around or even to be aware of a view of almost unearthly beauty． A sudden gust of wind nearly tore him from the ledge where he was perched． Gradually he raised his foot, tested the new foothold on the sheer rock wall, transferred his weight, and signaled to the climbers below．
　　Not until a tractor started working in the next field did he become conscious of his far from icy surroundings． He sat up, wiped his forehead with his handkerchief, glanced at his watch and sighed in resignation． He had a headache through sleeping in the hot sun, a pain in his shoulder from carrying his rucksack; his legs felt stiff and his feet ached． With no enthusiasm whatever he pulled the bulging rucksack over his shoulders and drew a large-scale map from his pocket． At the far end of the meadow two slates in the wall, which at this point replaced the hedge, indicated a stile, and beyond he could faintly see a thin thread of path which dwindled and finally disappeared as it climbed the steep slope of the down, quivering in the glare of the sun． The whole of Nature seemed to be luxttriating in warmth, sunshine and peace． Wherever he looked, leaves on twigs, grass blades, flower petals, all were sparkling in sunlight．
　　Fifteen miles off, over the ridge, across a broad valley and then over a higher, even steeper range of hills lay the youth hostel: supper, company, a cool dip in the river． With a momentary intense longing for ice-axe, blizzard, glacier and heroic exploit (none of which was at all familiar to him), Paul strode off unwillingly to less dramatic but equally heroic achievement in the tropical heat of an English sun．

All of the following failed to wake Paul up EXCEPT the __

A．sun
B．grasshopper
C．fly
D．tractor

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