Question

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57番の答えがなぜbになるのか、またなぜ他の答えではダメなのかを教えてください🙇‍♀️

(a) with great fluency (b) of great fluency
(c) at much fluency (d)
57. Many teachers think that this kind of book is ( ) little value.
(a) in (b) of (c) on (d) a
58. When I first met Mr. Johnson, I thought him rather young ( ) the p