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托福阅读真题1
PASSAGE 26
In July of 1994, an astounding series of events took place. The worldanxiously watched as, every few hours, a hurtling chunk of comet plunged intothe atmosphere of Jupiter. All of the twenty-odd fragments, collectively calledcomet Shoemaker-Levy 9 after its discoverers, were once part of the same object,now dismembered and strung out along the same orbit. This cometary train,glistening like a string of pearls, had been first glimpsed only a few monthsbefore its fateful impact with Jupiter, and rather quickly scientists hadpredicted that the fragments were on a collision course with the giant planet.The impact caused an explosion clearly visible from Earth, a bright flaming firethat quickly expanded as each icy mass incinerated itself. When each fragmentslammed at 60 kilometers per second into the dense atmosphere, its immensekinetic energy was transformed into heat, producing a superheated fireball thatwas ejected back through the tunnel the fragment had made a few seconds earlier.The residues from these explosions left huge black marks on the face of Jupiter,some of which have stretched out to form dark ribbons.
Although this impact event was of considerable scientific import, itespecially piqued public curiosity and interest. Photographs of each collisionmade the evening television newscast and were posted on the Internet. This waspossibly the most open scientific endeavor in history. The face of the largestplanet in the solar system was changed before our very eyes. And for the veryfirst time, most of humanity came to fully appreciate the fact that we ourselveslive on a similar target, a world subject to catastrophe by random assaults fromcelestial bodies. That realization was a surprise to many, but it should nothave been. One of the great truths revealed by the last few decades of planetaryexploration is that collisions between bodies of all sizes are relativelycommonplace, at least in geologic terms, and were even more frequent in theearly solar system.
1. The passage mentions which of the following with respect to thefragments of comet
Shoemaker-Levy 9?
(A) They were once combine in a larger body.
(B) Some of them burned up before entering the atmosphere of Jupiter.
(C) Some of them are still orbiting Jupiter.
(D) They have an unusual orbit.
2. The word collectively in line 3 is closest in meaning to
(A) respectively
(B) popularly
(C) also
(D) together
3. The author compares the fragments of comet Shoemaker-Levy 9 to all ofthe following EXCEPT
(A) a dismembered body
(B) a train
(C) a pearl necklace
(D) a giant planet
4. Before comet Shoemaker-Levy 9 hit Jupiter in July 1994, scientists
(A) had been unaware of its existence
(B) had been tracking it for only a few months
(C) had observed its breakup into twenty-odd fragments
(D) had decided it would not collide with the planet
5. Before the comet fragments entered the atmosphere of Jupiter, they weremost likely
(A) invisible
(B) black
(C) frozen
(D) exploding
6. Superheated fireballs were produced as soon as the fragments of cometShoemaker- Levy 9
(A) hit the surface of Jupiter
(B) were pulled into Jupiter's orbit
(C) were ejected back through the tunnel
(D) entered the atmosphere of Jupiter
7. The phrase incinerated itself in line 9 is closest in meaning to
(A) burned up
(B) broke into smaller pieces
(C) increased its speed
(D) grew in size
8. Which of the following is mentioned as evidence of the explosions thatis still visible on
Jupiter?
(A) fireballs
(B) ice masses
(C) black marks
(D) tunnels
9. Paragraph 2 discusses the impact of the comet Shoemaker-Levy 9 primarilyin terms of
(A) its importance as an event of great scientific significance
【TOEFL阅读理解|托福阅读真题TOEFL整合】(B) its effect on public awareness of the possibility of damage toEarth
(C) the changes it made to the surface of Jupiter
(D) the effect it had on television broadcasting
10. The target in line 20 most probably referred to
(A) Earth
(B) Jupiter
(C) the solar system
(D) a comet
PASSAGE 26 ADDBC DACBA
托福阅读真题2
PASSAGE 29
During the second half of the nineteenth century, the production of foodand feed crops in the United States rose at an extraordinarily rapid rate. Cornproduction increased by four and a half times, hay by five times, oats and wheatby seven times. The most crucial factor behind this phenomenal upsurge inproductivity was the widespread adoption of labor-saving machinery by northernfarmers. By 1850 horse-drawn reaping machines that cut grain were beingintroduced into the major grain-growing regions of the country. Horse-poweredthreshing machines to separate the seeds from the plants were already in generaluse. However, it was the onset of the Civil War in 1861 that provided the greatstimulus for the mechanization of northern agriculture. With much of the laborforce inducted into the army and with grain prices on the rise, northern farmersrushed to avail themselves of the new labor-saving equipment. In 1860 there wereapproximately 80,000 reapers in the country; five years later there were350,000.

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标题：TOEFL阅读理解|托福阅读真题TOEFL整合