________ gives us help is welcome.

________ gives us help is welcome.
A、No matter who
B、Whoever
C、Who ever
D、Those who
【正确答案】：B
【题目解析】：______ give us help是主从复合句______ give us help is welcome的主语，所以是主语从句，且从句缺少主语，Whomever 不能做主语，No matter who和No matter whom不能引导主语从句，所以选B。