题目

—Can you tell me why you learn English so well? —It’s easy.you work,grades you can get. A. The more careful; the best B. The more carefully; the better C. More carefully; better D. The more careful; the better 答案：B。考查比较级。答句句意: 很简单。你学习越认真, 你就会取得更好的成绩。“the+比较级……, the+比较级……”表示“越……, 就越……”, 第一个空格处的词修饰动词work, 因此要用副词carefully, 故选B。比3.9多0.9的数是（ ）。