__________ your valuable help, we couhtn't have finished the experiment ahea...

作者: tihaiku 人气: - 评论: 0
问题 __________ your valuable help, we couhtn't have finished the experiment ahead of time.
选项 A.If it were not for B. Had it not been for C.Were it not for D.If it has not been for
答案 B
解析 考查虚拟语气。本题是与过去事实相反的虚拟语气,如果省略if,句子要倒装,倒装时要将助动词提前,故选B。
更多 网友评论0 条评论)
暂无评论

Copyright © 2012-2014 知识的智慧 Inc. 保留所有权利。 Powered by cengyan.com

页面耗时0.0321秒, 内存占用1.02 MB, Cache:redis,访问数据库14次

鲁ICP备17016787号-14