4. He always does something casually. So casually is a ______ in his character.
A. proficiency B. defect C. virtue D. appendix
deficient 缺乏的
proficient 精通
efficient 有效的
sufficient 足夠的
defect 缺點
perfect 完美，完善
affect 影響，侵襲
effect 效應，后果
 |
 |