多少节数学课的英文怎么写

　　我知道数学课不受欢迎。

　　I am sensible of the fact that mathematics is not a popular subject.

　　令人惊讶的是，数学课被选为他们最喜欢的科目。

　　Surprisingly, mathematics was voted their favourite subject.

　　他讲数学课。

　　He gives lessons in mathematics.

　　How many subjects are you taking this year?

　　你今年修多少门课？

　　How many times do I have to tell you not to do that?

　　我得跟你说多少回不要做那种事？