单项选择题
A. To speed up the growth of animals. B. To make the animals fatter. C. To make the animals’ meat fit to eat. D. To make the animals’ meat rich in nutrients.
A. high grading standards will improve students’ academic performance. B. generous and easy grading standard sparks creativity. C. rewarding poor performance may kill the creativity of students. D. punishment is more effective than rewarding.
A. Making a lot of money by playing golf. B. Becoming a successful golfer. C. Running a golf course near his house. D. Both A&B.