根据对话语境和所给首字母提示，填写正确的单词完成对话

A: Zhao Fang,you s     to have an accent (口音). Were you brought up in Beijing?

B: No,I s     my childhood in the south.I didn't come to Beijing until I was 10 years old.

A: Are you used to l     in Beijing now?

B: Yes,everything is quite OK e     the winter.It's much colder than that in my hometown.

狭义的证券就指__________（）

A、商品证券

B、货币证券

C、资本证券

D、现金证券