填空题

The Internet can be used to distribute large amounts of information anywhere in the world __________________ (以最低成本).

【参考答案】

at a minimal cost
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Some old people_______________________ (愿意住进养老院 ) because they can enjoy better living environment and have professional care and treatment.
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If we are to ensure that our children and grandchildren inherit a world that is not altered for the worse by global warming, we must begin____________________. (采取措施减少全班干球气温上升所带来的污染总是)
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