题目

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。 I was nine years old when I learnt to ride a bike. The bike was a birthday present from my uncle. You can imagine how _40．(excite) I was when I saw the bike, and I begged my uncle to teach me how ____41．____ (ride) it right away. However, before I got on the bike, I felt _____42．____ (extreme) nervous and I was afraid that I would fall off and hurt _____43．____ (me). My uncle held onto the seat and helped me to get ____44．___ the bike. While I was riding, he was running a16．A．Don't say so．     B．Don't mention it．      C．It's my pleasure．