실시간 검색 더보기

(a) A: I wonder how do limestone cliffs form such colorful streaks?
(b) B: Iron oxide and sand deposits change the color from white to red and yellow.
(c) A: But where do they come? I thought limestone was made of prehistoric sea shells.
(d) B: Yes, but millions of years of weathering have left impurities on the rock’s surface.

 

저는 (c) come다음에 from이 빠져서 (c)가 답인줄알았는데 (a)가 답이더라고요.

how limetstone cliffs do form~ 어순으로 되어야 맞는건가요? 해설좀 부탁드립니다.