单项选择题
A. He has a darker skin now. B. He went south to get sun-tanned. C. He could not recognize his mother. D. He works in a southern state.
A. Because she was a black girl. B. Because she got the highest average in the class. C. Because she wanted to hit the chairman’s wife. D. Because she refused to retake the exam.
A. Expensive drugs may not prove the most effective. B. The workings of the mind may help patients recover. C. Doctors often exaggerate the effect of their remedies. D. Most illnesses can be cured without medication.