________ days ago, they went to the Mediterranean for a holiday.A.A few ofB.A little ofC.A lots ofD.A couple of
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D解析A couple of表示“几个人或几件事物”,修饰可数名词,这里的a couple of days ago表示“几天前”,而选项A我们只用a few,不用“a few of”来修饰可数名词,a little修饰不可数名词,而且也没有a little of结构,a lot of相当于lots of,既可以修饰可数名词,又可以修饰不可数名词,但这里的选项C结构不对,所以选D项。