专辑简介
语法填空之谓语动词专项练习题1．【★★☆】In the years since, the technology that powers cloning ________ (advance) slowly but steadily. （河南省实验中学2019-2020学年高二期中）【答案】has advanced/has been advancing【解析】 考查动词时态。根据上文In the years since可知应用完成时，此处可理解为过去发生的动作持续了一段时间到现在，用现在完成时，主语为technology，助动词用has；也可理解为过去发生的动作持续不间断地发生，用现在完成进行时，主语为technology，助动词用has。故填has advanced/has been advancing。2. 【★★☆】I figured I was too old and my opportunity (pass) .【答案】had passed【解析】考查动词时态。此处pass发生figured之前，即“过去的过
