A lot of the animals we need for food have to spend their whole lives in tiny spaces_ they're killed.
问题描述：
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,
答
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”