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 足够的
defect 缺点perfect 完美，完善affect 影响，侵袭effect 效应，后果
virtue 优点，美德virus 病毒virose 有毒的virgin 处女Virgo 处女星座appendix 附录，附属物