题目内容

When he gives the command, or stimulus, the dog ____(找出) drugs.

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Today, dogs may be employed to ____(闻出) illegal substances in school lockers or earthquake victims buried beneath the rubble of a collapsed building or highway.

And ____(说到……) VCRs, animals are even helping scientists make a videotape.

____(接纳猴子) when they're four to six weeks old is important, says Bailey. “That's when monkeys normally become socialized to other monkeys,” she says.

For example, compared with humans, dogs are “far superior at ____(找到) odors,” says Marian Bailey, an animal behaviorist at Henderson State University in Arkansas.