Ms.Yang:Good afternoon,professor.
Mr.Liu:Good afternoon,Yang.
Yang:Professor,may I ask you something about my english course?
Liu:Sure,I am free now.I am very glad for discussing your studying with you.
Yang:It's very kind of you,and I just wonder when we will take the middle exam of this term?
Liu:Eh...I think it should be 3 weeks later,but I can't decide the exact date yet.
Yang:Oh,thanks,it seems I must study harder from now on.
Liu:Perhaps it is.But don't be too nervous with that,it's just a ordinary exam and you are always very good,trust me.
Yang:Thanks for your praise,I believe I will do it well with your encouragement.Thanks a lot.
Liu:You are always welcome,lady.