问题补充：
When I was in high school, most of my friend had bicycles. I hoped I could also have it. One day I saw a second-hand bicycle, that was only one hundred yuan. I asked my father the money. But he said he could only give me half of the money. He should find the other half myself. So I went to sell newspapers after the school. My father was pleasing when I showed him the money a month after. He gives me the other fifty. You can imagine how much happy I was when I rode to school on my own bicycle.friend 加S.
答案：
(答案→)friend 加S.
解析：
【小题1】friend 加S.考查名词。句意：当我上高中时，许多的朋友有自行车。Most of 后面加名词的复数形式。
【小题2】it 改为one 考查代词。句意：我希望能有一辆。One 指同一类中的不同个。It代指同一内容。
【小题3】that改为which考查定语从句。句意：有一天我看到一辆二手自行车，它只卖100元。Which代指a second-hand bicycle，这是非限制性定语从句，故不用that.
【小题4】my father后加for考查介词。 句意：我要求父亲给我买。Ask sb for sth，向某人索要某物。
【小题5】He 改为I考查人称代词。句意：我必须得负担另外一半的钱。提到是我而不是父亲。
【小题6】after the school去掉the. 考查固定短语。After school放学后。
【小题7】pleasing 改pleased 考查形容词。句意：我的父亲很高兴当我一个月后给他钱时。修饰人用pleased。
【小题8】after改为later. 考查固定搭配。A month later,一个月后。
【小题9】gives改gave 考查时态。整体文章用一般过去时来讲述，用改成一般过去时。
【小题10】much删掉。考查感叹句。句意：你能想象当我自己骑车去学校时有多么快乐吗.how +形容词+主语+谓语，感叹句的构成。
