Science fiction stories______out-of-date when scientific knowledge the stories a

游客2025-06-14 2

问题 Science fiction stories______out-of-date when scientific knowledge the stories are based on changes.

选项 A、become
B、becoming
C、is becoming
D、becomes

答案 A

解析语法：动词形态1．选项均为动词。2．句子的主语science fiction stories是复数形式，因此(A)become为正确选项。

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