Man _______ on the earth for thousands of years . 选项: a、is existed b、are existed c、has existed

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• Man _______ on the earth for thousands of years . 选项: a、is existed b、are existed c、has existed
• Man _______ on the earth for thousands of years .选项:a、is existedb、are existedc、has existedd、have existed
• 翻译16.Man has existed on the earth for thousands of years.
• Man _______ on the earth for thousands of years . 选项: a、is existed b、are existed c、has existed
• 翻译16.Man has existed on the earth for thousands of years.
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• Man _______ on the earth for thousands of years .选项:a、is existedb、are existedc、has existedd、have existed