the train of the ladder insitute is running an e

the train of the ladder insitute is running an e The train is running fifty miles ______.　　A.an The train is running fifty miles _____. 同义句 look,the train is running fast look,the train is running AN instance of the game is already running Is Sam running on the train?什么意思 the car is running at the speed of 120 kilometers an hour on the bottom rung of the ladder The car is running at a s_____ of 80kilometres an hour. when he was running ()the train,something the train is running very fast t-------- the small town and A train is running through the plain in the rain.这句话的汉语意思是什么