北京成人英语三级A卷试题及答案
Part I Reading Comprehension (30%)
Directions：There are three passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A，B，C，and D. You should decide on the best choice and blacken the corresponding letter on the Answer Sheet.
Passage 1
Questions 1 to 5 are based on the following passage:
Scientists in India have invented a new way to produce electricity. Their invention does not get its power from  ...