Little Tom has got a lot of birthday presents, but he isn’t able to take all of them ___.

A．on time

B．at a time

C．at same time

D．from time to time

中国近代进行教育变革的最根本的原因是[ ]

A．西方先进科技文化大量涌入

B．传统教育与科学制度存在着危害

C．顺应世界的潮流

D．统治阶级想收买人心