【单选题】Stomach Ulcer Stomach ulcers are the cause of severe pain for many people.Doctors have been able to help lessen the pain of ulcers.They could not cure them.Now doctors have discovered a cause of ulcer...
【简答题】It was National Day last Sunday. And it was also Tom's birthday. He had a big party at home. His friends came and they all gave presents to him. They sang(sing的过去式) and danced. They were very happy. T...