问题补充:
The biggest whale is blue whale,which grows to be about 29 meters long—the height of 9-story building.
A. the;the
B. a;a
C. a;the
D. the;a
答案:
A. the;the
B. a;a
C. a;the
(答案→)D. the;a
解析:the blue whale特指“蓝鲸”这类动物;第二个空表泛指,a 9-story building意为“一座9层高的大楼”。