A good beginning makes a good ending. 
Hi! Good morning/ afternoon.
Good morning/afternoon, class./boys and girls.
It’s so nice/I’m so happy to see you again.
Good , you look great/ wonderful today.
OK, class/ boys and girls , are you ready to have class
單詞
Good!Nice!Great!Ok。Lovely!Perfect!Marvelous!Pleasant!Wonderful!Correct!Incorrect!Careless!Unclear!Untidy!
2•短語、
Very nice!Quite correct!Quite OK(Okay)!Neat and tidy!Well-done!Well-written!Justso-S0e Far from careless!