The experts were fully convinced that the animal ________a puma.
问题描述：
The experts were fully convinced that the animal ________a puma.
A:must be B:should have been C:can only be D:could only have been
我自己感觉应该是选择A
课文里面有一句话
The experts were fully convinced that the animal was a puma.
所以，我认为，D选项用完成时表示“本可以”或 “本可能”都不对
请知道答案的同学们帮忙下。
答
was
专家完全相信这个动物是美洲狮
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A选项要改成must have bee.对过去推测用must have done
【俊狼猎英】 欢迎追问选择题，不是课文的原文，请再看下。A选项要改成must have bee.对过去推测用must have done【俊狼猎英】 团队为您解答，欢迎追问请解释下，这里could only have been 的用法好吗could have been, 也用来对过去推测，可能是， 加only只可能是。