填空题 During the discussion , Mr.Boyd remained silent when asking his opinion.
A. During the discussion
B. remained
C. when
D. asking
【正确答案】
【答案解析】D 应改成asked。[解析] 在本句中要用被动语态，完整的句子为：“when he was asked…”。本句的意思是：“在讨论过程中，当博伊德先生被问到他的看法时，他保持沉默。”