–A boy was killed by the tiger in the zoo. –He was believed ______ into the cage
题型：不详难度：来源：
–A boy was killed by the tiger in the zoo.
–He was believed ______ into the cage while feeding the tiger without permission.| A．to fall | B．to be falling | C．to have fallen | D．having fallen |
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答案
| C |
解析
| 考察固定结构。Sb be believed to do sth某人被认为做某事；本题应该使用完成式，表示在谓语动词之前已经完成的动作。故C正确。 |
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