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It was about 600 years ago the first clock with a face and an hour was made. A.t

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It was about 600 years ago the first clock with a face and an hour was made. A.t

It wasabout 600 years ago ________ the first clock with a face and an hour was made.

A.that

B.until

C.before

D.when

 

试题答案

答案:A

解析:
It is …that 为强调句型

 

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