单项选择题
A. He invented a concentrated syrup for headache. C. He transformed cola to a soft drink. B. He invented cola as a soft drink. D. He made a lot of money from cola.
A. Because she can earn a lot of money. B. Because she can get practical experience in her field. C. Because she can come to know more people. D. Because she can get discount if living there.
A. are too high B. are too low C. are at a reasonable level D. are changeable