2. The world’s deepest cave, Pierre St. Martin in the Pyrenees Mountains, is almost three times as deep _____.
(A) as the Empire State Building is high.
(B) That the Empire State Building is higher.
(C) Is higher than the Empire State Building
(D) And the Empire State Building’s height.
答案：A
但有没人知道~~~Empire State Building is high到底什么结构？ | 
