完形填空。 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 fries (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 fries. I 9 to my feet, went over and said that I was 10 to buy another meal for them. Bet 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 (轮流) 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 (纸巾). 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. (     )1.A. served (     )2.A. carrying (     )3.A. divided (     )4.A. it (     )5.A. got (     )6.A. funny (     )7.A. afford (     )8.A. While (     )9.A. came (     )10.A. anxious (     )11.A. warmly (     )12.A. way (     )13.A. Surprisingly (     )14.A. seeing (     )15.A. wanted (     )16.A. wiping (     )17.A. should (     )18.A. In (     )19.A. curiously (     )20.A. How B. requested B. taking B. cut B. this B. settled B. crazy B. pay B. Since B. struggled B. willing B. proudly B. habit B. Sadly B. noticing B. asked B. touching B. could B. Upon B. carefully B. Who C. collected C. fetching C. changed C. that C. set C. strange C. demand C. As C. rushed C. satisfied C. kindly C. case C. Shockingly C. watching C. planned C. bathing C. might C. After C. naturally C. Why D. ordered D. bringing D. formed D. one D. turned D. poor D. choose D. Until D. rose D. quick D. seriously D. model D. Bitterly D. finding D. attempted D. washing D. would D. With D. plainly D. What