[文法] On what do adults often base their

[lovewin (思念天上的你們)]

20. ____ what do adults often base their views and attitudes toward others?

    (A) With (B) Of (C) In (D) On


答案為D

我想請問為什麼要選D呢??

是因為哪一個單字嗎??

謝謝


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