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  • An egg is such an efficient structure for protecting the embryo inside … difficult for the hatchling to break.
Question 1:
An egg is such an efficient structure for protecting the embryo inside … difficult for the hatchling to break.
A. that it is
B. that
C. and is

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Practice Quiz 31 | B2 – Upper-Intermediate

  • 30 minutes
  • 30 questions
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