根據(jù)上下文,用合適的話語完成對話（一部分）
A:Remember the old saying,"Time on task" Work hard at it,and ____.
B:I have difficulty with the four tones.No matter how hard I try,my pronunciation is poor.My Chinese sounds awful.
A:Try,try ang never say die"Listen to simple songs and watch Chinese language movies.Readessays and interesting Chinese stories that have tapes or CDs.You'll ____ your Chinese.That's a promise.
B:___________________?
A:Of course.We are friends and that's what friends are for.Don't worry.