问题
选择题
If we ________ one of the other uploading approaches, the process would have taken longer than one hour.
A.used
B.had used
C.should use
D.would use
答案
答案:B
句意:如果我们使用其他上传方法,那么这个过程要超过一个小时。分析句子结构和时态可知,题干是表示与过去事实相反的虚拟语气,故从句谓语动词用had done形式。