题目

My son was badly hurt in a fire. After he   36   from a series of treatments, the doctors told him they would not do any operation for six months   37   it took long for the skin to stop shrinking. So, he had to return to college with a visible 10-inch   38   on his face. I said to my son, “Keaton,   39   will pay any more attention to your scar  40  you do. If it does not bother you, it will not bother others,  41   .” He took my advice to heart and returned to school with his head  42  high — glad he was alive.   43   , everyone has scars and shortcomings. Som（2005?常德）吸烟有害健康，烟气中含有一种能与血液中血红蛋白结合的有毒气体，它是（ ）A．氢气B．一氧化碳C．二氧化碳D．氧气