(a) A: Mom! The earth atmosphere is most composed of nitrogen and oxygen.
(b) B: How smart my son is! Where did you learn it?
(c) A: It says here in the book I borrowed from a library yesterday.
(d) B: Read as many books as possible, and you will be smarter.
답은 (a)에요. most->mostly
근데 (c)에서, it says~에서 it 이 book인 건가요? 영 이런 표현이 익숙하지가 않네요 ㅠㅠ
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