【題目】—Do you want to be healthy?
—________.Smiling can help you stay healthy.
A.Smile
B.Smiling
C.Smiles
D.To smile

【答案】A
【解析】句意：-你想要健康嗎？-微笑，微笑可以幫助你保持健康。Smile微笑；Smiling 是動名詞形式；Smiles是第三人稱單數(shù)形式；To smile是動詞不定式形式。這里是一個祈使句，故用動詞原形，選A。

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