从方框中选择最佳选项完成对话，有两项多余
a. Maybe you're right.
b. Is there anything wrong?
c. I'll try to understand her.
d. She nags me about almost everything.
e. That's a good idea.
f. But she doesn't like it at all.
g. Could I use your telephone, please?
A: Hello, Xiao Hong!
B: Hello!
A: You look a little upset. ____
B: Yes. It's just my mom. She always nags(唠叨)me.
A: Really? What does your mother nag you about?
B: ____“Get up now. . . . Everything must be in place. . . . Don't forget your piano lesson. . . . ”
A: Well, all the mothers like saying these words to their children.
B: Also, I'm fond of pop music. ____We don't have the same interest in many things.
A: ____ But I should say she nags you because she cares about you. You're lucky to have such a good mother.
B: I agree with you. ____
A: That's right. Understanding is important. If your mom knows that everything is fine, she will never nag.
中，
成等差数列，则
的值为
