关于when,as,while的一道英语题目The students are playing basketball__ it began to rain.A.as B.while C.when 请给出解释.

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关于when,as,while的一道英语题目The students are playing basketball__ it began to rain.A.as B.while C.when 请给出解释.

关于when,as,while的一道英语题目The students are playing basketball__ it began to rain.A.as B.while C.when 请给出解释.
关于when,as,while的一道英语题目
The students are playing basketball__ it began to rain.
A.as B.while C.when
请给出解释.

关于when,as,while的一道英语题目The students are playing basketball__ it began to rain.A.as B.while C.when 请给出解释.
C.后面是begin这个瞬间动词,不能用延续的while,as

B, while
时间状语从句

C
when,当什么什么时候.......当学生们在打篮球的时候下雨了.
as解释为作为,显然不能用
while后跟延续性动词,而begin是短暂性动词,显然while不适合

当然是when了