The ability to store knowledge makes computers different from every other machine______ invented.

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问题 The ability to store knowledge makes computers different from every other machine______ invented.

选项 A、ever
B、thus
C、yet
D、as

答案A

解析 ever意为“至今,曾经”,如:Nothing ever happens in this village.这个村子从未发生过什么事情。ever invented 是过去分词短语作后置定语,相当于一个定语从句(that has ever been invented)。根据句意,A最符合题意。 thus是“像这样,如此”的意思,thus far才表示“至今,迄今为止”,要和完成时连用。Yet一般用于否定句和疑问句中,通常用于句末,也可用于句中,as作为副词,一般用来修饰形容词或副词,表示比较。
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