8、The earth cannot ______ enough food and energy to support its present population and its descendants (后代).A、findB、put outC、yieldD、execute

2021-04-14

答案：

--答案：C

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2. Carl Sagan believes that Venus might be colonized from earth because ____. A: it might be possible to change its atmosphere B: its atmosphere is the same as the earth’s C: there is a good supply of water on Venus D: the days on Venus are long enough
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Mount Huashan is famous for________. A: Its views B: Its history C: Its precipices D: Its food
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Although the United States covers so much land and the land produces far more food than the present population needs, its people are by now almost entirely an urban society. Less than a tenth of the people are engaged in agriculture and forestry(林业), and _
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Romania suffered another ___ in its efforts to obtain financial support for its reforms.
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The word execute in Paragraph 3 shares its meaning of