We are organizing a lot of activities to celebrate the birthday of the Communist Party of

问题补充：

We are organizing a lot of activities to celebrate the birthday of the Communist Party of China these months.

A. nineteen

B. ninety

C. nineteenth

D. ninetieth

答案：

A. nineteen

B. ninety

C. nineteenth

(答案→)D. ninetieth

解析：考查点：数词。解题思路：此题通过序数词的考查让学生了解中国一件大事：即纪念中国共产党诞生90周年。根据定冠词the和语境可以知道本题考查序数词。