问题补充：
People in America and Canada usually make to celebrate Thanksgiving Day.
A. rice dumplings
B. moon cakes
C. pumpkin pies
D. birthday cakes
答案：
A. rice dumplings
B. moon cakes
(答案→)C. pumpkin pies
D. birthday cakes
解析：考查节日习俗。句意“美国和加拿大的人们通常做南瓜派来庆祝感恩节。”A“粽子”；B“月饼”；C“南瓜派”；D“生日蛋糕”。故选C。
