A lot of the animals we need for food have to spend their whole lives in tiny spaces_ they're killed.A.unlessB.onceC.untilD.when为什么?请详细说明,分析每个选项,

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Alotoftheanimalsweneedforfoodhavetospendtheirwholelivesintinyspaces_they''rekilled.A.unlessB.onceC.un

A lot of the animals we need for food have to spend their whole lives in tiny spaces_ they're killed.A.unlessB.onceC.untilD.when为什么?请详细说明,分析每个选项,
A lot of the animals we need for food have to spend their whole lives in tiny spaces_ they're killed.
A.unless
B.once
C.until
D.when
为什么?
请详细说明,分析每个选项,

A lot of the animals we need for food have to spend their whole lives in tiny spaces_ they're killed.A.unlessB.onceC.untilD.when为什么?请详细说明,分析每个选项,
错了吧,答案应该是C
根据意思判断
“直到被杀死之前,它们一生的时间都在狭小的空间度过”

只有 When 翻译的过来.
A 和 C 是否定 not ...until 前面没有否定
B是一旦的意思! 这句话应该就是说 杀猪要先把猪些都关进猪圈. 宰杀他们要先把他们集合起来的意思 所以同步!