问题
选择题
_____ this instrument should have put its work permit number on the box.
A．Who checked
B．Whoever inspected
C．No matter who examined
D．Those who estimates
答案
答案：B
whoever引导主语从句，失去疑问含义，表示强调"无论谁；谁……谁就……"等于 anyone who；而who引导名词性从句时， who保留疑问含义"谁"。