Elroy版主,这个题我依然有个疑惑:关于sequence的问题,既然文中已经出现了after,难道不是已经表明了不同事件之间的sequence了吗? 比如 Laura LEFT home after she LOCKED the door. 这个题目里,增长是在下降之后,两个事件之间已经有一个after,A选项为什么还要强调用不同的时态?
而且C的现在完成时我也不理解:文中说,increase的时间是during the first 3 months of this year,就是已经发生并且结束的事,这里的have increased是强调过去对现在的影响吗?感觉在文中也看不出这一点。。。
manhattan里的原文:Likewise, we already know that locked happens before left because of the word before. The words before and after indicate the sequence of events clearly and emphatically enough to make the use of the Past Perfect unnecessary.