根据单词首字母和句子意思,将对话中的单词补充完整.= =

A:Welcome back________ to school,Ben.
B:Nice to meet________ you,Mr Green.
A:There is a new________ subject in this term_______,do you know?
B:Yes.It’s S________ S________.
A:Do you like________ it?
B:Maybe.I think________ it will be interesting________.
A:Of course.When do you have________ this lesson________?On Monday________?
B:No.It’s on Friday________.Who________ will teach us,Mr Green?
A:Mr Zhang.He is a very good teacher________.