(2013·湖北武汉武昌区高三联考)One way to ________ species under threat of extinction—whatever the cause—is to remove them to zoos or parks and feed them there.

Jenny hopes that Mr. Smith will suggest a good way to have her written English ________ in a short period.

She insisted that she ______ not guilty, but we insisted that she ______ into prison.

Thanks to the application of new farming methods, the out put is now _____ it was before the year 2000．

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