WiththesuccessfullaunchofTiang

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更新 2022-09-03
科目英语
题型单选题
难度中等
浏览 1262

With the successful launch of Tiangong-I, which was ______ breakthrough in space field, China's space dream took a step closer to ______ reality.
A. a; / B. the; a C. a; the D the; /

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