选择题：天京事变是太平天国统治集团之间的内讧,事变中

Nobody but you _______ what he said.A. agrees with B. agrees out C. agree with D. agree to

_______ is a fact that English is being accepted as an international language. A. There B. This C. Th

They ________ extensive and possibly dangerous actual flight training. A. undertake B. undergo C. und

垄断阶段较之自由竞争阶段竞争范围扩大的主要体现是出现了（ ）A．部门内部的竞争B．部门之间的竞争C．国内竞争D．国际竞争

试述社会主义社会与共产主义社会的共同点与区别。