句型转换。 1. He started dancing at the age of four.(改为同义句) He started dancing _____ ______ ______ _____ ______ ______. 2. He is too young to go to school.(改为同义句) He is _____ _____ _____ to go to school. 3. Tony was born in 1997 .(对画线部分提问) _____ _____ Tony born? 4. Bruce hiccupped for two months .(对画线部分提问) _____ _____ _____ Bruce _____? 5. My mother is at home now.(改为过去时态) My mother _____ at home yesterday.