问题描述:
i believe that man reach Mars by _____ .
A:the year 2020 B:years 2020 C:2020 year D:2020 the year
选出答案并解析原因,最好带上例句
A:the year 2020 B:years 2020 C:2020 year D:2020 the year
选出答案并解析原因,最好带上例句
问题解答:
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