2. 外语
  3. Man has used metals for centuries in gradually increasing quantities, but it was________ the Industrial Revolution that they cam

Man has used metals for centuries in gradually increasing quantities, but it was________ the Industrial Revolution that they cam

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问题 Man has used metals for centuries in gradually increasing quantities, but it was________ the Industrial Revolution that they came to be employed in really vast quantities.
选项 A、till
B、until
C、not until
D、not till
答案C
解析 人类使用金属的数量在几百年里逐渐增加，但直到工业革命时，金属才真正被大量使用。强调句型题。题干是一个并列句，由but连接，前后是转折关系。后面的句子是强调句，强调句式为"it was+被强调部分+that+句子剩余部分”，被强调部分含not until结构，意思是“直到……”。所以C项为正确答案。
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