Not until recent years ______ a popular means of communication.

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问题 Not until recent years ______ a popular means of communication.

选项 A、e-mail became
B、e-mail has become
C、did e-mail become
D、will e-mail become

答案C

解析 本题测试倒装句的用法。句首为否定词或否定意义的词语时,常用部分倒装(有时要借助助动词do等)。本句句首为not until,所以要使用部分倒装。这样表示否定的词或词组主要有:hardly,little,never,by no means,no sooner等。所以首先要排除A和B;其次根据信息词recent years判断句子不能用将来时,故答案为C
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