根据短文内容，从方框中选出能填入空白处的最佳选项。(选项中有两项为多余选项) Saying Goodbye Many people were waiting for the train. Some were reading newspapers and some were saying goodbye to their friend． Doctor Smith, Mr. Lee and Mr. Brown were talking so happily that ____16____ Then the guard called loudly, “The train is going to leave. ____17____ The three men heard the guard and two of them jumped onto the train quickly before it moved. One was left behind. It was Dr. Smith. He ____18____ The guard came to him and said, “Don’t worry. ____19____ ”“I know.” Dr Smith said，“ ____20____ My friends only came to say goodbye to me. ” A. But it is my train. B. they didn’t know the train was going to leave. C. was very excited. D. Hurry up, please. E. looked very sad. F. The next train will come in ten minutes. G. Take your time.

马克思主义哲学的诞生，实现了哲学史上的伟大变革，标志着哲学发展进入了一个崭新时代。之所以做出上述判断，是因为马克思主义哲学（）

①第一次实现了唯物主义和辩证法的有机统一

②第一次实现了唯物辩证的自然观与历史观的统一

③第一次实现了实践基础上的科学性与革命性的统一

④全面继承了德国古典哲学，将哲学发展推向更高阶段

A.①②④

B.①②③

C.①②③④

D.①③④