单项选择题
A. I don’t mind her being invited. B. Being criticized in class is an insult to me. C. He insisted on being kept waiting outside. D. The problem being discussed is very important.
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.