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：可联系答.案.网客服索取。
