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
网友回答
A. the; the
B. a; a
C. a; the
(答案→)D. the; a
解析：句意：最大的鲸是蓝鲸，它能长到大约29米长---它是9层楼的高度。the表示特指这种鲸；a表示泛指。故选D。