题目

 Sara’s grandpa died in 2003. He has been ______  for more than ten years.        A. dead                        B. alive        C. dying                       D. living 答案：A某商品价格为a元，降价20％无人问津，又降价20％后，销售额猛增，商店决定再提价40％，提价后这种商品的价格为________元．