18 September

  • English (US)
  • English (US)
Question about English (US)

In copper engraving and etching____ caused by the edge of the plate is clearly visible on the paper

A. The impression is
B. If the impression
C. impressions
D. The impression

Why the answer is D
I don't understand
I think " caused by the edge is passive voice.
So, it loses "subject and verb as "is" to complete the passive voice sentence.

What do you think???

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