题目内容
4.The teacher told us to remain silent unless _______.( )A. | to be asked | B. | asked | C. | being asked | D. | you asked |
分析 老师叫我们保持沉默,除非我们被问到.
解答 答案 B.
此句是从属连词unless引导的条件状语从句. 主句是The teacher told us to remain silent老师叫我们保持沉默.从句完整的形式是unless we were asked.除非我们被问到.在从句中,asked的主语是主句的宾语"us"这里省略"we were",故答案为B.
点评 本题属于非谓语动词的考查,应该学会先判断语态,根据非谓语动词与逻辑主语间的主被动关系可以排除部分干扰项;再根据时态排除部分干扰项,从而可以得出正确选项.
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