A：Hello，Mary，you don't look well．What’s up?

B：Oh，I'm very busy and tired．

A：___1___

B：We are going to have the graduation exam this week．I'm not ready for it．

A：__2__ You have been studying hard，I know．

B：But I'm still not sure of myself．

A；Why not listen to some light music．___3___

B：___4__ I'll have a try．

A．And you should go to bed as usual and have a good sleep．

B：Thank you．