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语法与词汇The international situation has been growing ________difficult for the past few years
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语法与词汇After people have learned that magnets attract things, centuries passed _____ they took note of the fact thatmagnets sometimes also repel things.
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语法与词汇Some countries have taken more ________ measures to save life and property damage from earthquake
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语法与词汇After a hearty breakfast, my companions and I traveled by snowmobiles a few miles farther north to a rendezvous point where the ice was thinner
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语法与词汇________pollution control measures tend to be money-consuming, many industries hesitate to adopt them
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语法与词汇Yet many Japanese seem more at ease with the idea of stately decline and genteel isolation
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语法与词汇Some schools have tried to attract and _____ able teachers by improving working conditions andraising salaries.
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语法与词汇The high-pressure engine was ________lighter in proportion to horsepower, and with less than half as many moving parts was much easier and cheaper to repair
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语法与词汇He asked ________since he had been chairman for seven years
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语法与词汇In the sentence Its no use waiting for her, the italicized part is ________
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语法与词汇To help students understand how we see, teachers often draw a(n) ________ between an eye and a camera
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语法与词汇It is well admitted that the high _____ rate is caused in part by failure to communicate.
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语法与词汇You must ________your old passport when applying for a new one
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语法与词汇Mary delayed her departure until morning ________
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语法与词汇Winter is the ________ season for the hotels in this seaside town, because very few tourists come to stay
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语法与词汇Its no good ________ her
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语法与词汇The system no longer had much interest ________nontraditional new and extra services to older youths
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语法与词汇The Middle Eastern bazaar takes you far back hundredseven thousandsof years
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语法与词汇With sufficient scientific information, a manned trip to Mars should be ________
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语法与词汇When they returned to the river, they found that the boat had _____ away.
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