Consecutive, continual的用法

Although the unemployment rate reached an all-time high in mid-2009, it has fallen for four (A) consecutive (B) continual. months by December.

我查字典兩個字都是 連續不斷
為何答案是 A consecutive 那答案 B continual 為何錯
是否可以解釋 習慣用法 故只能用 consecutive

請各位大大解謎惑 謝謝
1 個解答 1