問題詳情
【題組】29.
(A)The West Antarctic region was once an open ocean.
(B) The West Antarctic ice sheet was about 7,000 feet thick.
(C) The West Antarctic ice sheet was once floating ice.
(D)The West Antarctic region used to be warmer than today. Passage Two
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)