孝敬父母，要从小事做起，正确区分孝敬在不同场合的具体要求。[ ]
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补全对话。根据上下文的意思，把下列对话补充完整。
A: Hello, Nice to meet you!
B: 1._________________________! How long have you been in Zhuzhou?
A: For half a year.
B: 2._________________________?
A: It is a beautiful city.
B: Why did you come to study here?
A: Because my father got a job here.
B: Oh, 3.________________________?
A: He is a policeman.
B: Cool, I want to be a policeman, too.
4.________________________ ?
A: I want to be a singer.
B: 5.________________________?
A: Because I like singing very much.
腾冲位于云南省西部边陲，境内有97座火山群、62处地热泉，盛产翡翠玉石。图为“岩石圈物质循环示意图”，数字序号表示岩浆、岩浆岩、变质岩、风化物、沉积物，字母表示各种地质作用。据此回答下题。
腾冲所在地区山高谷深，形成其峡谷的外力作用主要是（）
A.冰川侵蚀
B.风化作用
C.风力侵蚀
D.流水侵蚀
