In the USA Thanksgiving Day is a harvest festival. Traditionally it is time to give th

问题补充：

In the USA, Thanksgiving Day is a harvest festival. Traditionally, it is time to give thanks for the harvest and express gratitude in general.

A. the; a

B. /; the

C. /; a

D. the; the

答案：

A. the; a

B. /; the

(答案→)C. /; a

D. the; the

解析：句意：在美国，感恩节是个收获的节日，传统上，它是一个对收获表示感谢和感激的时间。第一空不填，Thanksgiving Day：感恩节前面不加the，第二空填a，泛指“一个时间”，选C。