Many things______impossible in the past are common today.

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问题 Many things______impossible in the past are common today.

选项 A、considered
B、to consider
C、considering
D、to be considered

答案A

解析分词作后置定语。许多以前被认为是不可能的事现在都很普遍了。故需要用被动语态，但又由于是过去的事情故不需要用to be considered形式。

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