我一定是疯了

突然想起来买古筝，就立马上网搜索，一眨眼几个小时就这么过(add去)了。等到要下手的时候，掂量了下口袋了（delete 了 and add 里）的钱包，再看看自己的扬琴和琵琶，再入手古筝，(change"," to "?")回家不被老妈念叨才奇怪呢！学了那么多年的扬琴还是吊儿郎当的，全部都丢回了给老师(delete the "了" and put it in to the end)。大学(add “时”)手痒买了琵琶，也只学了一点轮指，再去学古筝，这三分钟热度，重蹈覆辙的几率太大了！我还是先去面壁思过吧。

You are doing a fantastic job! How many years have you been learning Chinese? It is so good that I can not tell this is from a foreigner.