单选题 Australia began to assume its modern configuration by the Eocene Epoch, some 50 million years ago, when Antarctica broke away and drifted southward.

A、 status
B、 sphere
C、 shape
D、 situation

【正确答案】 C

【答案解析】解析：本题中，configuration的意思是“外形”。C项“shape外形”符合题意，如：A huge shape loomed up through the fog．(一个巨大的影像在雾中隐约出现。)其他三项“status地位；sphere球；situation情况”都不正确。