短文改错（10处）求大神帮忙! 

Yesterday was my birthday.As before,I got a lot of gifts,and（1、but,但） I wasn't excited.Instead,I felt boring（2、bored,感到无聊的）.At this（3、that,那时） time,Mom comes（4、came） in.She sat beside me and said,"How about going out with me to choose gift for your sister's birthday on（5、去掉on） next Saturday?' We got outside and spent almost two hour（6、hours,复数） deciding on a toy for my sister.Back home,I felt very tired."Now you see how many（7、much,不可数） time others spent choose（8、choosing,花时间挑选） gfits for you.So you should be thankful to me（9、them,他们）,"Mom said to me.I learned from Mom what（10、that,宾语从句引导词） we should always have a grateful heart in our life.