22. Many scientists wonder__________ life on the moon or not.(A) is there (B) there is (C) if is the

問題詳情

22. Many scientists wonder__________ life on the moon or not.
(A) is there
(B) there is
(C) if is there
(D) if there is

參考答案

答案：D
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題目翻譯為：許多科學家想知道是否在月亮上...

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