Writing a letter or reading a book may appear to be ______ activities in which individuals exercise personal skills.
A、scarce
B、sophisticated
C、solitary
D、sincere
【正确答案】：B
【题目解析】：scarce缺少的；sophisticated复杂的，精致的； solitary孤独的；sincere真诚的句意：写信或读书似乎是复杂的活动，个人在其中锻炼个人技能。
