Unit 6 An old man tried to move the mountains.一单项填空(共15小题;每小题1分,满分15分)从每小题所给的A、B、C、D四个选项中选出一个能够填入空白处的最佳选项。( )1. old man in a black hat is my PE teacher. He used to play football with us.A. A; the B. An ;the; C. The; / D. An; /( )2. do you like your holiday in Mount Tai?We enjoyed it very much. The sight is very beautiful. A.What B. How C.Why D. Where( )3. Why was Yu Gong trying to move the mountains?Because it was fo