① ② （0＜x＜π）     ③y=e^x+4e^﹣x④y=log₃x+4log_x3．

下列说法错误的是（　　）

根据对话语境，在空白处填写恰当的句子补全对话
A: Good morning!
B: Good morning! I’d like to join the school volunteer project, but____ .
A: OK, don’t worry. Let me help you.____ ?
B: I love singing and telling stories.
A: Well, you could help look after young children on weekends.
B: ____ . I can sing for them and tell them stories. I’m sure that  children will love me.
A: I agree with you. ____ ?
B: Sure. I am Peter White. My telephone number is 885-276.
A: OK. I’ll call you as soon as possible.
B: ____ .
A: It’s my pleasure.