The best time for a training session to begin is when the dog is somewhat hungry because the trainer can use food to tempt the dog to follow his command.
【简答题】Mark often attempts to escape _____ whenever he breaks traffic regulations. (A) having been fined (C) to have been fined (B) to be fined (D) being fined
【简答题】Life in Darwin (in the far north of Australia ) had always been free and easy. From May to October, the weather was the best. Tourists arrived in large numbers from the south to (1) the winter cold. H...