在下面对话的空白处填入适当的话语（话语可以是句子、短语或词），使对话完整。

A: Hello, Tom. You look upset.?

B: I can't decide whether I should take part in our school art festival.

A: ?

B: For the celebration of National Day.

A: Oh, I see. When will the festival begin?

B: It'll begin on September 25th.

A: I know you're good at singing.?

B: Great idea! But?

A: How about I love you, China?

B: It's too difficult. I'm afraid I can't sing it well.

A: . You have a long time to practice it well.

B: I agree with you.