B. losing
C. quitting
D. offering
53. A. put in
B. turn in
C. take in
D. get in
54. A. yards
B. shelters
C. camps
D. cottages
55. A. when
B. what
C. whether
D. how
第三部分:阅读理解(共20小题,每题2分,满分40分)
第一节(共15小题;每小题2分,共30分)
阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。
A
What will power your house in the future?Nuclear,wind,or solar power?According to scientists at the Massachusetts Institute of Technology(MIT)in the US,it might be leaves—but artificial(人造的)ones.
Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis(光合作用).Now researchers have found a way to imitate this seemingly simple process.
The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts(催化剂).Similar to natural leaves,it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell,which uses those two materials to produce electricity,located either on top of a house or beside the house.
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