I need___paper,Mum.Iwant to write____letter to my English teacher_英语解答

I need___paper,Mum.Iwant to write____letter to my English teacher.
选项：A any:some B some:a C a:some D some:any
请说明为什么.

人气：100 ℃　时间：2019-08-17 23:42:18

解答

B
I need__some_paper,Mum.I want to write__a__letter to my English teacher.
妈妈,我需要一些信纸.我想给我的英语老师写一封信.
paper是不可数名词所以不能用a修饰,any表示任何一个,some表示一些.所以前一个空是some.后面的letter是可数名词,而且句中给出的是单数,所以说明是一封信,用a.