题目内容
4.It is reported in the newspaper that a man escaped from the prison last night and it was a long time ______ the guards discovered what had happened.( )A. | when | B. | until | C. | since | D. | before |
分析 据报纸上报道,昨天晚上有一位囚犯越狱,过了好长时间后警卫人员才发现发生了什么事.
解答 答案:D
It is+一段时间+before…句型表示:(…之后)才…,until是直到…才,常用于否定句,since自从,主句一般用现在完成时态.所以本题选择D.
点评 考查从属连词时要注意前后句之间的逻辑关系,同时掌握选项中各个连词的具体用法及句型结构.
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