问题
The Spring Festival is __________January or February. It’s often cold _______ this time of year. But people in China are all happy __________that day.
A:in, on, at
B:at, in, on
C:in, at, on
D:on, at, in;
B:at, in, on
C:in, at, on
D:on, at, in;
正确答案是：
