the telephone was invented in the nineteenth century speech sounds

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问题 ______ the telephone was invented in the nineteenth century ______ speech sounds over a long distance in a few seconds.

选项 A、Not until... could people send
B、Not until... people could send
C、Until... could people not send
D、Until... people could send

答案 A

解析该题考查考生对倒装句的掌握。Not until开头的句子要倒装。类似的句式还有Only when...，Only if...等。例如：Only when the data is complete will the transfer takes place．只有数据完整了，我们才能实施转让。

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______ the telephone was invented in the nineteenth century ______ speech sounds