3．Peoplebreathe（呼吸） more slowly when they are asleep．

分析 當(dāng)人們睡著的時(shí)候，他們呼吸地更慢了．

解答 答案：breathe
此處在主句中作謂語(yǔ)；根據(jù)從句when they are asleep使用了一般現(xiàn)在時(shí)可知，本句描述的是人們睡著時(shí)的通常狀況，所以這里應(yīng)使用一般現(xiàn)在時(shí)；由于主語(yǔ)People表示復(fù)數(shù)，故填breathe

點(diǎn)評(píng) 本題考查了單詞拼寫(xiě)；做類(lèi)似的題時(shí)，除了掌握單詞的正確拼寫(xiě)外，還應(yīng)結(jié)合句意，從語(yǔ)法分析的角度去判斷句中所填單詞的形式；在本題中，由于空缺處在主句中作謂語(yǔ)，并且根據(jù)從句的時(shí)態(tài)以及主語(yǔ)的單復(fù)數(shù)形式，確定出了此處所填單詞的形式應(yīng)是動(dòng)詞原形breathe．

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