So far there is no proof______people from other planets do exist.

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问题 So far there is no proof______people from other planets do exist.

选项 A、which
B、that
C、what
D、how

答案B

解析 同位语从句。同位语从句是名词性从句的一种,that只起连接主句和从句的作用,在从句中不但任任何成分,本身也没有词义,that不能省略。在 belief,fact,idea,thought,way等词后常用同位语从句。
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