用合适的句子补全对话。A: Hi, Wang Fei. You look very unhappy. {#blank#}1{#/blank#}?
B: I failed the math exam yesterday.
A: {#blank#}2{#/blank#}. But you don't need to worry about it all the time.
B: I really don't know how to learn math well.{#blank#}3{#/blank#}?
A: Maybe you can join our math group, so that we can help each other.
B: Sounds great.{#blank#}4{#/blank#}?
A: Tomorrow, if you like it. I'm sure you will be better and better. Now, don't be sad!
B: Thank you so much. {#blank#}5{#/blank#}.
A: That's great!