【題目】Doing exercise often __________ good for our __________.

A.are;healthB.is;healthC.are;healthyD.is;healthy

【答案】B

【解析】

句意:經(jīng)常鍛煉對我們的健康有益。

考查be動詞和名詞。根據(jù)句子結(jié)構(gòu),Doing exercise為動名詞短語作主語,動名詞短語做主語,謂語用單數(shù)形式,故be動詞應(yīng)用is,A、C選項可排除。根據(jù)第2空前形容詞性物主代詞our提示,空格處應(yīng)填入名詞,health為名詞,故選B。

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