Computers first came into use .A. in 1950s B. on the 1950s C. in the 1950s 题目和参考答案——青夏教育精英家教网—

题目内容

Computers first came into use ________.

A. in 1950s B. on the 1950s C. in the 1950s

【解析】

试题分析：句意:电脑首次被使用是在20世纪50年代。在某个世纪某个年代应该用介词in，还应该在in后用定冠词，在数字后加s,根据句意故选C。

考点：考查短语的用法。

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