Read the【Case Reflection】in this section and answer the following questions:

Mr M, a junior middle school English teacher, is very strict with his students' pronunciation. He thinks that teaching English pronunciation is mainly teaching basic English speech sounds. If students read phonetic symbols, letters of the alphabet and words correctly, they will, according to Mr M, have good pronunciation. When students pronounce words incorrectly, Mr M always carefully explains the details of the pronunciation and corrects every mistake his students make. But after a term, his students' oral English has not improved and it is still very difficult for them to express themselves fluently in English.

2.What do you think are the problems in Mr M's approach to teaching pronunciation?

What do you think are the problems in Mr M's approach to teaching pronunciation?