完形填空【广西桂林市第十八中学2016届高三第一次月考】 I was having my dinner at McDonald's one evening when an old couple slowly walked in. They 1 their meal, took a table near the window and started 2 food out of the plate. There was one hamburger, one order of French fires(炸薯条) and one drink. The man 3 the food into two halves and carefully placed 4 before his wife. He took a sip(一小口) of the drink. His wife also took one and then 5 the cup down between them. "That 6 old couple! All they can 7 is one meal for the two of them, "thought I. 8 the man began to eat his French fires, I 9 to my feet, went over and said that I was 10 to buy another meal for them. But he 11 refused me and said that they made it a 12 to share everything. 13 , the lady didn't take a bite. She sat there 14 her husband eat, and taking turns sipping the drink. Again I 15 to buy them something but was refused. When the man finished eating and was 16 his face with a napkin. I 17 no longer stand it. I made an offer to them a third time. 18 being politely refused. I asked the lady 19 , "Madam, why aren't you eating You said that you share everything. 20 is it that you are waiting for "The teeth," she answered.