a piece of 是词组吗

a piece of 是词组吗 是a piece of 是固定词组 还是 a piece of adcice 是个词组 a piece of的词组 例:a piece of cake小菜一碟 请问grammar应该用什么词组修饰?a piece of grammar可以吗? a.please.have.piece.cake.of连词组句谢谢 哪个英语句子是对的：I have a good piece of news.I have a piece of good news.刚开始我也觉得是第二句对的，但是有碰到过类似的词组，如：a beautiful piece of music，那不是说明第一句是对的吗？但是照常 a piece of summer.a piece of A piece of cake意思是? 所有英语数量词组(如a cup of~a piece of)有中文翻译, 大家帮我看看,这英语词组对不?a piece of papermany pieces of paper a piece of bread可数吗 a piece of cake=easy吗? a piece of work a blank piece of take a piece of A piece of a piece of a piece of cake