二、完形填空 A young college student thought he had chosen the wrong major（专业）at a common college，so he drank every day and didn't 1 at all. He felt more and more 2 about his future. But he was never 3 from Professor Yang's Biology class. He liked the course. Besides，Yang's class was so 4 that he always listened carefully，never caring about 5 the other students were paying attention or not in class. Once he put a 6 in the homework he handed in，saying，“Professor，it is said that today's college 7 are cheaper than potatoes. Do you agree?” That day Professor Yang 8 for him after class. When he came，he found the professor at a table with 9 on it. They drank happily over their meal. When they became half drunk，the professor took out a small 10 that was sprouting（发芽的）. “Do you know how much this 11 ?” he asked the young man. “It's soft but poisonous. 12 will take it even if it's free.” He then 13 the potato away. The professor then 14 him another potato. It was half the size of a football and perfectly round. “This potato is organic（有机的）. It is 15 large and fresh but also free of pollution. It is in high demand and quite popular.” The young man was impressed by what he'd heard. “Be such a potato，” said the professor. （ ）1. A. help B. sleep C. study D. play （ ）2. A. hopeful B. interested C. hopeless D. sad （ ）3. A. late B. absent C. busy D. pity （ ）4. A. interesting B. boring C. famous D. short （ ）5. A. if B. weather C. whether D. that （ ）6. A. paper B. point C. sentence D. note