A:①③
B:②④
C:②③
D:①④
It's generous __ ___ them to donate money to UNICEF. They think it important _____ them to help poor children go to school.
中国社科院张海鹏教授认为:中国近代史的发展呈现出由“沉沦”到“上升”的发展过程,中国社会走出了一条“U”字形道路。在近代中国历史的前期,其基本特征是“沉沦”;近代中国历史的后期,其基本特征是“上升”。在“沉沦”与“上升”中间有一个过渡期,这里所指的过渡期是( )