pumas never attack a human being except ___cornered.
1 they are 2 being 3 that they are 4 when they are
请问选择哪一个,及分别说出每个为什么对与错
人气：382 ℃ 时间：2020-06-04 19:07:27
解答
答案是 4 .EXCEPT在这里是介词,後面不好直接加句子,所以要用that / when 链接,在加句子.1和2就被排除了.3 被否定,是因为 except that + 句子------强调这样的概念：------强调事实的陈述,不强调事情发生的时间.He do...
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