单选题
Only after the invention of computers, ______ a step further.
A、
did the process of automation go
B、
the process of automation went
C、
so the process of automation
D、
went the process of automation
【正确答案】
A
【答案解析】
[精解] 完全倒装句题。完全倒装句结构应该为“助动词+主语+动词”，所以 [A]为正确选项。
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