asked to help me with my lessons, he always refused, saying he was too busy.
A. Whatever
B. Whenever
C. Whoever
D. However
网友回答
A. Whatever
(答案→)B. Whenever
C. Whoever
D. However
解析：考查词义辨析：A. Whatever无论什么B. Whenever无论什么时候C. Whoever 无论是谁D. However无论怎样，句意：每当没请求帮助我的英语的时候，他都是拒绝，说自己太忙了。选B。