I was about to leave my office _____i was told that the president would visit our company.A.while B when C as D if为什么不能选C

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Iwasabouttoleavemyoffice_____iwastoldthatthepresidentwouldvisitourcompany.A.whileBwhenCasDif为什么不能选CI

I was about to leave my office _____i was told that the president would visit our company.A.while B when C as D if为什么不能选C
I was about to leave my office _____i was told that the president would visit our company.
A.while B when C as D if
为什么不能选C

I was about to leave my office _____i was told that the president would visit our company.A.while B when C as D if为什么不能选C
这里只能用when.
be about to do ...when 意思是”正要去做某事这时……”
下面讲讲为什么不能选C
因为when可以和延续性动词连用,也可以和短暂性动词连用;
而as只能和延续性动词连用.
本题中"leave"和"told"都不是连续性动词,
所以不能用------as-------

虽然as 有当什么时候的意思,但这是固定搭配,be about to do when

be about to do when。。。是固定搭配。正要做某事的时候。。。
as 有正如的意思,与句子意思不相符
希望能帮到你~!

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