He always helps us he is doing when we turn to him for help.
A. whenever
B. whatever
C. whichever
D. however
网友回答
A. whenever
(答案→)B. whatever
C. whichever
D. however
解析：四个选项分别表示无论什么时候、无论什么、无论哪一个和无论怎样，根据题意这里的引导词为do的逻辑宾语，故选B，当我们向他寻求帮助时，无论他正在做什么，他总是帮助我们。