单项选择题

Quite a number of people have written to ask me, "How do you face life Have you ever felt lonely, lonely (26) the point of (27) " I say that once in the past I have. Now life is meaningful for me and full (28) joy. I have come to understand (29) Karl Marx meant when he said happiness (30) in struggle. Work and study give me the greatest (31) . My only complaint is that time is not (32) to me. Before and after work I often give acupuncture to (33) who have come to me help; during lunchtime, I listen to lessons on the radio; when I come home from work there are lessons on TV. The only time (34) reading and thinking is the evening, but often I have to see friends or answer letters at that time. (35) I wish I had a 48-hour day! As a (36) person I know fully well that time is valuable and life is (37) . I feel deeply sorry for those people who, (38) young and healthy, do not (39) the best years of their life. I often tell myself how wonderful it would be (40) I could take the hands of these friends and we could advance together in our studies.