第二节：完型填空(共20小题，每小题1.5分，满分30分)
Recently I was invited to a friend’s house for supper—and had a meal I have never had before.
All the friends invited were a little 　36　. It’s not that Ben is unsociable, or a bad cook, but it’s just that he never　37　more than he has to. So how come he was inviting us round for a meal? Had he bought something　38　 for his friends? He greeted us at the door and showed us into his dining room where a　39　table was waiting for us. “Nothing but the　40　 for my friends! ” said Ben. We all sat down and looked　41　at each other—what was he 　42　?
Ben returned with four bowls of hot soup. “It’s a　43　of carrots, potatoes and tomatoes, ”said Ben. The next　44　was also a little strange　45　we didn’t quite know what it was again. “It’s just another mixture of vegetables. ”
As we ate we chatted and finally the　46　turned back to what we were eating. “Was there a recipe(菜谱) for this, ”asked Marina, “or did you　47　it up? ”Ben put his fork down. “What I cooked　48　what I could find. ”Marina was surprised. “But you can find anything in supermarkets these days. ”“But there’s　49　choice in what you can find　50　supermarkets, ” he replied.
　51　that we had all finished the food, Ben decided to tell the truth. He had read recently that supermarkets usually　52　away 5 percent of their food every day. So Ben decided to look inside his local supermarket bins. There he found food that was slightly out of　53　, boxes of thrown-away vegetables and fruit.
So Ben had　54　 provided a decent meal for his friends, and made us aware of the fact that there are many poor people who need the food, but the amount of food thrown away is enough to 　55　millions of people.
36.A. excited      B. disappointed  C. surprised   D. delighted
37.A. takes        B. spends       C. uses       D. does
38.A. cheap        B. special       C. practical    D. usual
39.A. new         B. separate      C. booked     D. laid
40.A. freshest      B. most         C. best        D. least
41.A. nervously     B. carefully      C. sadly      D. happily
42.A. in for         B. up to         C. away from   D. out of
43.A. mixture       B. liquid         C. matter      D. dish
44.A. course      B. food            C. soup       D. salad
45.A. in that      B. on condition that  C. in case that   D. so that
46.A. dinner      B. idea            C. food        D. subject
47.A. pick        B. look            C. make       D. take
48.A. referred     B. depended on     C. lay in       D. resulted from
49.A. less         B. more           C. some       D. any
50.A. within       B. beyond         C. inside      D. outside
51.A. Feeling      B. Seeing          C. Realizing   D. Thinking
52.A. store        B. move           C. throw      D. hide
53.A. order        B. place           C. season     D. date
54.A. successfully   B. possibly        C. hardly     D. hopefully
55.A. enrich        B. please          C. affect     D. Feed

For many years, scientists couldn't figure out how atoms and molecules on the Earth combined to make living things. Plants, fish, dinosaurs, and people are made of atoms and molecules, but they are put together in a more complicated way than the molecules in the primitive ocean. What's more, living things have energy and can reproduce, while the chemicals on the Earth 4 billion years ago were lifeless.
　　After years of study, scientists figured out that living things, including human bodies, are basically made of amino acids and nucleotide bases. These are molecules with millions of hydrogen, carbon, nitrogen, and oxygen atoms. How could such complicated molecules have been formed in the primitive soup? Scientists were stumped.
　　Then, in 1953, two scientists named Harold Urey and Stanley L. Miller did a very simple experiment to find out what had happened on the Primitive Earth. They set up some tubes and bottles in a closed loop, and put in some of the same gases that were present in the atmosphere 4 billion years ago: water vapor, ammonia, carbon dioxide, methane, and hydrogen.
　　Then they shot an electric spark through the gases to simulate bolts of lightning on the ancient Earth, circulated the gases through some water, sent them back for more sparks, and so on. After seven days, the water that the gases had been bubbling through had turned brown. Some new chemicals were dissolved in it. When Miller and Urey analyzed the liquid, they found that it contained amino acids-the very kind of molecules found in all living things.
61. When did scientists come to realize how the atoms and molecules on the Earth combined to make living thing?
　　A. 4 billion years ago. B.1953.　C. After seven days.D. Many years later.
62. Scientists figured out that human bodies are basically made of .
A.amino acids
B.molecules
C. hydrogen, carbon, nitrogen and oxygen atoms
D. water vapor, ammonia, carbon dioxide, methane and hydrogen
63. Harold Urey and Stanley L.Miller did their experiment in order to .　
A. find out what had happened on the Earth 4 billion years ago
　　 B.simulate bolts of lightning on the ancient Earth
　　 C. dissolve some new chemicals
　　D.analyze a liquid
64. At the end of the last paragraph, the underlined word "it" refers to .
A. a closed loop   B. an electric spark   C.water   D. the liquid
65. According to the writer, living things on the Earth include .
　A. atoms and molecules                     B.chemicals　
C. plants, fish, dinosaurs and human beings     D.the primitive soup