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問題詳情:

   Exploring

    Exploring ________ space is exciting, yet dangerous. There is _______need for both robots and humans for space exploration.

A. the; a                   B. a; the                    C. /; a                        D. /; /

【回答】

C

知識點:冠詞

題型:選擇題

標籤: Exploring
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