1、All the students in Class 3 listen to the teacher carefully in class.2、People ofen make telephone calls to each other.3、“take my hat off to ”欣赏或敬佩
选A，I take my hat off to you on this 。you are great.you are great.表明已经是称赞了，选A理解为，摘你帽子，都可以向你鞠躬了，对你和佩服
我向你脱帽问候。
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