It was about 600 years ago _______ the first clock with a face and an hour hand
题型：不详难度：来源：
It was about 600 years ago _______ the first clock with a face and an hour hand was made.| A．that | B．until | C．before | D．when |
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答案
| A |
解析
| 考察句型。该句为强调句，强调句的特点是去掉It was ……that……以后句子结构完成。即，the first clock with a face and an hour hand was made about 600 years ago 句子结构完整。 |
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