语法与词汇 17.While waiting for the opportunity to get______, Henry did his best to perform his duty.

【正确答案】 B

【答案解析】句意：当等待升职的机会时，亨利尽心尽力地履行自己的职责。根据前后逻辑关系，Henry和promote之间是被动关系，只有B项表被动，故答案选B。