15. The design department finally presented their new packaging ideas ______ more than four months of research.
a. during b. in c. after d. beside
정답은 c.
왜 b는 아닐까요?
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15. The design department finally presented their new packaging ideas ______ more than four months of research.
a. during b. in c. after d. beside
정답은 c.
왜 b는 아닐까요?
1
