英语知识点问题内容较多,见谅.That shop all kinds of clothesA sell B sell C

英语知识点问题
内容较多,见谅.
That shop all kinds of clothes
A sell B sell C buys
这个是填那个?我填的是A 是错的,老师叫我们写上关于这个的知识点,一定要写知识点,
Today is Septenber 10th .It's Day .Let's go and buy some flowers for our teacher.
A teachers B Teachers' C the Teacher's D Teacher's
我选D是错的,还是要写知识点,帮帮~
第一题的B是sells 不好意思,本人疏忽