About ten years ago,I was walking along this quiet London street one evening___it suddenly rained.A.while B.when C.as D.before解释一下为什么,为什么不选D?

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Abouttenyearsago,IwaswalkingalongthisquietLondonstreetoneevening___itsuddenlyrained.A.whileB.whenC.a

About ten years ago,I was walking along this quiet London street one evening___it suddenly rained.A.while B.when C.as D.before解释一下为什么,为什么不选D?
About ten years ago,I was walking along this quiet London street one evening___it suddenly rained.
A.while B.when C.as D.before解释一下为什么,
为什么不选D?

About ten years ago,I was walking along this quiet London street one evening___it suddenly rained.A.while B.when C.as D.before解释一下为什么,为什么不选D?
选B.当when从句放在主句之后时,它更强调某一动作的突然性,此时的when相当于and then,and suddenly,just at that time

应该是选D
你这是几年级的题吖?

选B。when 在这里应理解成“就在这时”或”“突然”。 指在某个动作发生的同时突然发生了另一动作。