题目内容
_____ 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
解析:
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"。
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