Both the summer and the winter Olympic Games are held every four years on a basis.
A. magical
B. regular
C. familiar
D. logical
网友回答
A. magical
(答案→)B. regular
C. familiar
D. logical
解析：句意，夏季奥运会和冬季奥运会都是按照规定，每四年举办一次。magical 魔力的 regular 有规律的 familiar 熟悉的 logical 逻辑的，根据题意，故选B。