用所給單詞的正確形式填空。

None of them ________(have)an environment like that of the earth．

答案：has/have
解析：

　　none of them作主語(yǔ)，謂語(yǔ)動(dòng)詞用單數(shù)、復(fù)數(shù)都可以。


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