填入一个适当的单词补全对话，每空一词。

A: Hello, may I __1__ to David?

B: Speaking!

A: Hi, David! This is LinTao speaking.

B: Hi, LinTao. What's __2__?

A: What are you going to do next Sunday?

B: __3__ much. Do you have any idea?

A: Shall we go to the zoo? I hear there is a dolphin show there.

B: A dolphin show? Good __4__! How can we get there?

A: By bus or by bike?

B: OK, let's go by bike. When shall we meet?

A: What about a quarter past ten?

B: Why __5__ meet a litter earlier? Let's make it half past nine.

A: Good! No problem.