一件羽绒服，原价是480元，九折出售，便宜了（　　）

A．432元

B．48元

C．50元

D．240元

短文改错（共10小题；每小题1分，满分10分）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句最多有两处，每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\） 划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词;

2. 只允许修改10处，多者（从第11处起）不计分。

This morning I got up early and went to school as usually, only to find there were nobody in the classroom because it is Sunday. “How a bad memory I have!” I couldn’t help laughing. Stand in front of the school gate, I began to wonder what to do next. Suddenly a good idea occurs to me. “Why not get together with some good friends for a picnic in such a fine weather?” I immediately telephoned some of my best friends, but they all agreed to join me. About two hours late, we finally arrived a pleasant park with trees and flowers here and there. We really enjoyed us greatly.