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精英家教網 > 初中英語 > 題目詳情
_______ good for our health.
A.Do exercise isB.Doing exercise is C.Do exercises areD.Doing exercises are
B

試題分析:句意:做鍛煉有利于我們的健康。do exercise做鍛煉,exercise當鍛煉時,是不可數名詞,沒有復數形式。be good for對……有好處;利于。此處作主語,故用動名詞短語,動名詞短語做主語,謂語用單數形式。故選B。
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