1.before是选题的关键所在,表明该句应该用完成形式.
2.主句为：Remarkable breakthroughs in gene research may lead to dramatic changes in medical,你可以试着问：具体怎样做到“lead to dramatic changes in medical”呢?方法就是通过“making it possible to create drugs tailored to a patient's genetic makeup”
E项句子都读不通；
D项伟定语从句,这里不适用.
3.celebrate sth with 用.方式庆祝.1.我上过新东方的课，那老师说after/before/until引导的时间状语从句不搭配现在完成时，而是搭配过去完成时和一般过去时。这里的D选项却用了having been?2. make的用法不是make (sth) do或make it to sth吗？而C选项是make it to do?帮忙解答，谢谢！1.在此提一点建议，新东方老师讲的多是应试技巧，对于老师讲的东西，你最好能够分析真正理解，找到其根本所在，使之成为你自己的东西，做到不变应万变（题型一直在变），否则。。。2.此处“Never having seen anything like this style of architecture before”是一个原因状语从句，此处省略了主谓语“I had not seen nything like this style of architecture before ”,因为后面还有一套主谓语，一个句子中不能出现两套主谓语，于是我们通常会将其中一套主谓语用状语的形式给出。此处还有一种类似情况：seeing the house on fire,I called the police immediately yesterday.3.请不要断章取义，原句为“making it possible to create”分解如下：make it be possible;it is possible to do sth.