题目内容：

Jack swims very fast .Mike swims faster than jack.(理解句意,填空) Mike is （）at（）tha jack.
Mike （） （） in （）than jack.

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Jack swims very fast .Mike swims faster than jack.(理解句意,填空)Mike is （better）at（swimming ）than jack.Mike （does） （better） in （swimming ）than jack.注：句中有than 要用比较级,be good at doin...