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The Egyptians ______ copper as early as 5,000 years before Christ.A、they were us
The Egyptians ______ copper as early as 5,000 years before Christ.A、they were us
游客
2025-07-28
13
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问题
The Egyptians ______ copper as early as 5,000 years before Christ.
选项
A、they were using
B、having used
C、may have used
D、using
答案
C
解析
may have used表示对已发生事情较肯定地猜测。
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