running is exercise同义句

Her favourite sport is running.同义句 mike is good at running 同义句 Walking is a fine exercise同义句 Walk is good exercise的同义句 Exercise fifty is diffcult的同义句 running is exercise什么意思? running is exercise.改为一般疑问句 同义句 look,the train is running fast look,the train is running Peter is good at running.（同义句转换） running is my favourite sport 同义句 ----my favourite sport --- he is running in 800-meter race同义句 swimming is more dangerous than running改为同义句