The missing bird______from the hole in the cage.

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问题 The missing bird______from the hole in the cage.

选项 A、would be escaping
B、must have escaped
C、might as well escape
D、was to have escaped

答案B

解析 must have been表示较为肯定的猜测。
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本试题收录于: 英语题库普高专升本分类
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