题目

完形填空 When I was a child, my mother often worried about her age and complained about growing older. I struggled to 1 answers about why she lived in such 2. When I first 3 that I wouldn't live forever, I went to Mama for answers and for 4 She provided the answers I feared, but instead of comforting me, she only added, “At least you have 5 time left than I do.” Her 6 didn't comfort me then or in the years that followed. I worried about death,7 that my life would eventually 8. At the age of thirty-six, Mama was diagnosed(诊断) with cancer and was 9 six months later. It was years befo笔盒放在水平课桌上，笔盒受到的力是 [　　] A．重力和课桌对它的支持力 B．重力和它对地球的吸引力 C．它对课桌的压力和课桌对它的支持力 D．它对课桌的压力和它受到的重力