For many years,the course “the rudiments of chemistry” was taught by Professor Duke.Once two young men chose this course as their optional subjects,and they did so well in every test that their scores were all A’s.including the mid-term exam.The friends were so confident about the final exam that they decided to go to Vi-rginia University to have a party with some friends at the weekend just before the exam,which was to be held on Monday. For many years, the course “the rudiments of chemistry” was taught by Professor Duke.Once two young men as this course as their optional subjects, and they did so well in every test that their scores were all A’s.including the mid -term exam.The friends were so about about the final exam that they decided to go to Vi-rginia University to have a party with some friends at the weekend just before the exam,which was to be held on Monday.