2014
高考英语阅读理解精英定时系列训练题（20）及答案《湖北省黄冈中学2013二模》d astronaut mark kelly announced today that he is retiring from nasa in order to focus on the recovery of his wife, gabrielle giffords. kelly, who is 47, began his nasa career in 1996. he has traveled to the international space station four times and served aboard space shuttles (
