阅读下面短文,掌握其大意,然后从1~20各题所给的四个选项(A、B、C和D)中,选出最佳选项。 (一) A Strange Greeting, a True Feeling Last week I was invited to a doctor’s meeting at the Ruth hospital for incurables. In one of the wards a patient, an old man, got up shakily from his bed and moved towards me. I could see that he hadn't long to 1 , but he came up to me and placed his right foot close mine on the floor. “Frank!” I cried in astonishment. He couldn’t 2 , as I knew, but all the time 3 his foot