--Excuse me, teacher, can I ask you something about the last class? I didn’t quite understand it.
--Sure! Please feel _________to ask me anything!
A.fine | B.free | C.OK | D.right |
--Excuse me, teacher, can I ask you something about the last class? I didn’t quite understand it.
--Sure! Please feel _________to ask me anything!
A.fine | B.free | C.OK | D.right |