He was puzzled by this phenomenon. He began to try every approach _________ the best way of working it out.

A. known to find  B. knowing to find  C. known finding  D.knowing finding

A


解析:

第一題 選A ，原因是這里面的known 是做形容詞，被知曉的。形容approach方式 途徑。 后面的to find 接目的狀語，表示 目標(biāo)。

B knowning 動(dòng)名詞一般是主動(dòng)意思，所以不正確。

C D不能表示目的含義。

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