题目内容

I think walking is________ our health.
A．good atB．bad atC．well in D．good for
D
本题考查be good at的使用。本题的含义为我认为步行对我们的健康有益。be good for 表示对….有好处！符合题意；而be bad at表示对……有害：do well in表示在……做得好；be good at表示擅长做……的含义，后三者与本题的含义不符，故本题选D。
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