题目内容
____ the sun, nothing would grow.
A. For B.With C. Under D. Without
D
口算题卡加应用题集训系列答案
综合自测系列答案Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.
| A. recently B. affects C. pattern D. varied E. floats F. warm G. regularly H. mysterious I. effect J. evidence |
Big climate changes in the last million years might have come from something very small: dust from outer space.
Earth changes between ice ages and warm periods in a(n) ____ that includes several cycles, including a ___ one that lasts 100,000 years. Scientists ____suggested this cycle might be due to changes in the inflow of cosmic(宇宙) dust.
The idea is that Earth ___above and below the imaginary plane that runs through the sun and Jupiter(木星), completing a cycle every 100,000 years. So maybe it encounters ___varying amounts of dust during each cycle that produce the climate trend.
Now there is some ____, from ancient cosmic dust recovered in ocean-floor drilling near the Azores islands west of Portugal. The large quantity of the dust rises and falls with a wonderful 100,000 year cycle during the period analyzed, 253,000 years to 458,000 years ago. Periods of more dust are related to____ climates.
But that is a long way from showing that the dust ____ climate. Some scientists argue that it is not clear how cosmic dust would make the climate warmer while dust from volcanoes is known to make it cooler. They say the cosmic dust is so thin that it is hard to see how it could have any climate____.
Nevertheless, the new study shows scientists have to take the cosmic dust idea seriously.
That holiday morning I didn’t have to attend school. Usually, on holidays, Mother 36 me to sleep in. And I would certainly take full advantage of it. On this particular morning, ___37___,I felt like getting up early.
I stood by my window overlooking the ___38___, having nothing better to do. But as it turned out, I was soon to learn about something ___39___ in life.
As I watched several people go by, get into their cars and go off, I ___40___ an old man on a bicycle with a bucket on its ___41___ and a basket rags and bottles on its back-carriage. He ___42___ from one car to another, washing and cleaning them. From the water on the ground, it seemed that he had already ___43___ washing and cleaning about a dozen or more cars. He must have begun to work quite early in the morning.
Several thoughts ___44___my mind as I watched him work. He wasn’t well-dressed. He had on a pair of shorts and a(n) ___45___ T-shirt. The bicycle he rode was not by any means the kind modern ___46___would want to be seen riding on. But he seemed___47___ with life. There he was, working hard at his small business, ___48___ at passers-by and stopping to chat now and then ___49___ elderly men and women on their way to the market nearby.
There was a noticeable touch of___50___ in the way he seemed to be doing things— ___51___the windscreen (挡风玻璃), then standing back to admire it; scrubbing (擦净) the wheels and ___52___, standing back to see what they look like after the scrub.
It was a ___53___ to learn, I felt. At no age need one have to beg for a ___54___if one has good health and is willing to work hard. For a while I felt ___55__ of myself. Young as I am—just sixteen, and there was this old man who must have been usefully engaged perhaps before the sun appeared above the horizon.
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