用方框内所给单词和短语的正确形式填空,补全下面的对话.
you'd better;on;that's a good idea; happen; with; what is the matter;i am fine;you're welcome;why don't you;come on
a:_____________?
b:nothing?
a:don't cheat me!there must be something wrong ______ you.are you feeling sick?
b:no,_______.
a:oh,_______,tell me.i just want to help you.
b:i am very worried now.
a:why?what_______?
b:my father didn't allow me to watch tv my favorite english program on tuesday evening.
a:_______________ buy a tape recorder to study english?
b:oh,it is too expensive.
a:i see.well,___________ talk with your father and tell him what's good on tv.don't let him worry about you.
b:_________________!thank you!
a:_________________!