_____ 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
_____ 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
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"。