—What do you think of the 2013 Spring Festival Party?
—Well, great! But I don't think much of ________ held last year.
A:the one
B:it
C:one
D:which
He didn't go to school yesterday __________ he was ill.
划分温度带的主要指标是( )
尼罗河定期泛滥的时间是( )