填空题 The sick boy mustn’t left alone all night and we should 1 at sitting up.
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【正确答案】 1、take our turn    
【答案解析】解析: The sick(病态的) boy mustn’t be left alone(leave alone让…独自呆着;不管)all night and we should take our turn我们轮流 at sitting up.( sit up.迟睡,熬夜)生病的孩子不能独自一整夜,我们应该轮流熬夜