All of the plants now raised on farms have been developed from plants___wild.A.once they grew B.they grew once C.that once grew D.once grew答案选什么?为什么?

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Alloftheplantsnowraisedonfarmshavebeendevelopedfromplants___wild.A.oncetheygrewB.theygrewonceC.thato

All of the plants now raised on farms have been developed from plants___wild.A.once they grew B.they grew once C.that once grew D.once grew答案选什么?为什么?
All of the plants now raised on farms have been developed from plants___wild.
A.once they grew B.they grew once C.that once grew D.once grew答案选什么?为什么?

All of the plants now raised on farms have been developed from plants___wild.A.once they grew B.they grew once C.that once grew D.once grew答案选什么?为什么?
选C
农村上现在种植的植物都是从原先的野生植物发展而来.
once是曾经,原来的意思

我选C
All of the plants now raised on farms have been developed from plants_that once grew_wild.
现在，在这个农场里生长的所有植物都已经从那曾经在生于野外的植物中萌发起来了。
（我翻译得有点恶心）
plants （that once grew ）wild
that o...

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我选C
All of the plants now raised on farms have been developed from plants_that once grew_wild.
现在，在这个农场里生长的所有植物都已经从那曾经在生于野外的植物中萌发起来了。
（我翻译得有点恶心）
plants （that once grew ）wild
that once grew wild 是个定于从句，修饰plants
意为：曾经生于野外的植物。

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