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It was about 600 years________that the first clock was made.A、agoB、beforeC、sin
It was about 600 years________that the first clock was made.A、agoB、beforeC、sin
游客
2025-06-21
29
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问题
It was about 600 years________that the first clock was made.
选项
A、ago
B、before
C、since
答案
A
解析
句意:第一个时钟的发明是在600年前。本题考查的是表示时间的引导词。ago在……之前,before在……之后,since自从……故A正确。since用在“从时间点开始的行动或状况一直持续到现在”的句中,主句多用完成时。如:I’ve been here since July. 我从7月份开始就在这里了。
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