1. (2021九上·哈尔滨开学考) 填入一个适当的词完成对话，每空一词.

A: David, would you like to go swimming with us tonight?

B: Yes, love to. But I'm afraid I'm not in a good mood.

A: You look so upset. What's up?

B: I lost the table tennis game yesterday.

A: Oh, what a. !

B: I don't want to play table tennis . I lost the game with the first ball.

A: Come on! Failure is the mother of . Don't lose heart 'm sure you'll succeed.

B: Perhaps you're right. for encouraging me!

A: You're welcome.