We have not obtained very much experiment data ______ conclusion between the two possibilities.

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问题 We have not obtained very much experiment data ______ conclusion between the two possibilities.

选项 A、on which to base
B、to base on
C、which is based on
D、to be based on

答案A

解析特殊疑问代词与不定式搭配做定语的用法，动词base所接的介词on不可省。

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