1.She has more books than me,书面语中这么说有点问题(口语里是可以的),than连接的前后两句要求结构“对等”.改一下可以有两种说法.1.She has more books than I do(do 代替have)2.Her books is more than mine.
2.see sb doing 是看见某人正在做某事,see sb do sth 看见某人做了某事(已做完)
所以在该题中括号里要填play或playing.而其他的要看具体的时间状语以及结合题目来做,一般有具体时间点的用doing.
3.填played,play本身就是个延续性动词,没必要用进行时.(而且也不能是直接填playing啊,要填也是was playing,时态一定要一至)