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____ is good _______ your health.
A.Walk, toB.Walking, to
C.To walk , withD.Walking, for
D
不定式与动名词都可以在句中作主语,一般情况下,不定式与动名词作主语可以互换,但不定式常常指某次具体的、将要发生的行为;而动名词则表示一般的、抽象的行为。例如: To save money now is not easy. 现在攒钱不容易。 Saving money is a good habit. 攒钱是个好习惯。“散步有益于健康。”是一般的、抽象的行为。故选D。
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