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It would be a shallow kind of optimism to assume that the introduction of the art of inventing has been an immediate and unmixed blessing to mankind.

  • A.It would be a shallow kind of optimism to believe that the introduction of the art of inventing has directly benefited only mankind.
  • B.It would be a shallow kind of optimism to believe that the introduction of the art of inventing has benefited mankind directly.
  • C.It would be a shallow kind of optimism to think that the introduction of the art of inventing has blessed mankind immediately and blessed only mankind.
  • D.It would be a shadow kind of optimism to believe that the introduction of the art of inventing has benefited mankind immediately and brought them only benefit.
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