高中英语.perhaps I ---- Swim across the nver,but in that situation,I--- do that.
问题描述：
高中英语.perhaps I ---- Swim across the nver,but in that situation,I--- do that.
perhaps I ---- Swim across the nver,but in that situation,I--- do that.A,am able;couldn't.B,cowld;was able to. C,was quite able to;could. D,couldn't ;was able to. 请说明理由,谢谢.
答
D,couldn't ;was able to
A 是时态不一致
B 无转折意味,题干有but
表示在过去具体某一次（but in that situation）不用could,要用was able to,排除C
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