【单选题】【消耗次数：1】
9. The goal is to keep this land alive, to ______ animal population and keep it growing.
①
insist
②
keep
③
preserve
④
kill
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相关题目
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Quizzes are part of the lecture program to keep students engaged and keep them _________, for students to be able to check that they understood what was covered.
①
thinking
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think a lot
③
to think
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pays
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①
fitly
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____ what the situation would be like, they decided to keep silent.
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③
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①
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④
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①
Any period longer than four weeks, you will be fined
②
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③
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④
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①
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①
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随机题目
【单选题】
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①
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②
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③
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④
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