Many things______impossible in the past are very common today.A、considerB、consi

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问题 Many things______impossible in the past are very common today.

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

答案 C

解析本题考查过去分词的用法。句中主语为things，considered是过去分词形式表被动，“被认为”，considered impossible in the past为过去分词短语在名词后作后置定语，表示“在过去被认为是不可能的”。因此选C。

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