he said that chinese history was very hard to understand.为什么

he said that chinese history was very hard to understand.为什么 chinese history is very hard to understand Chinese history was hard to understand.怎样理解to un Astralian friends thought Chinese history was very hard to u he said that he was working hard at English He said he was very glad to visit the Great Wall 为什么visit用原形 What the teacher said is so hard that he can t understand it What the teather said isso hard that he can't understand(改为同 He said it was only once in history that the Nobel Prize ___ it was said that he-------[choose]to go to tibet 不及物动词后面可以接宾语从句,那么he said to his mother that the boy was very MY friends in Australia said that Chinese histroy was very h