高二英语的问题1.Sales of CDs have greatly increased since the early1990s,when people_____to enjoy the advantages of this new technology.这道题答案是began,但答案为什么不是had begun呢?2.过去完成进行时和过去完成时怎

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高二英语的问题1.Sales of CDs have greatly increased since the early1990s,when people_____to enjoy the advantages of this new technology.这道题答案是began,但答案为什么不是had begun呢?2.过去完成进行时和过去完成时怎
高二英语的问题
1.Sales of CDs have greatly increased since the early1990s,when people_____to enjoy the advantages of this new technology.
这道题答案是began,但答案为什么不是had begun呢?
2.过去完成进行时和过去完成时怎么区分啊?
3.He kept looking at her,wondering whether he____her somewhere
A.saw B.has seen C.sees D.had seen
请帮忙选一下正确答案并解释为什么...但之前请先翻译一下这句话
4.She is the only one of the girls who___in the country.
A.is well paid B.are well paid C.is paying paying well D.are paying well
要求同“3”
5.--The last one___pays the meal
--Agreed
A.arrived B.arrives C.to arrive D.arriving
要求同“3”

高二英语的问题1.Sales of CDs have greatly increased since the early1990s,when people_____to enjoy the advantages of this new technology.这道题答案是began,但答案为什么不是had begun呢?2.过去完成进行时和过去完成时怎
1,因为题目上说了since the early 1990s,说了具体时间,用过去式.
2,过去完成进行时,是说明从过去到过去某个时间一直在做的事,had been doing sth.；过去完成时,是说明在过去已经完成的事,had done sth.
3,他保持看着她,好奇是否以前在哪见到过.选D,因为前面是过去式,说明在那之前看到过她就要用过去完成时.
4,他是这个村里所以女孩中唯一一个有很好报酬的人.选A,be well paid是固定的好的报酬的说法.
5,最后一个到的为这顿饭付账.选C,考察非谓语动词,所以用to arrive.
回答完毕.
看我这么精心回答,给分吧,如果能追加更好噢：）15少了点.哈哈.

高二英语的问题1.Sales of CDs have greatly increased since the early1990s,when people_____to enjoy the advantages of this new technology.这道题答案是began,但答案为什么不是had begun呢?2.过去完成进行时和过去完成时怎英语CAT的问题,Sarah runs her own business and is registered for sales tax.This week her purchases were $2,350 inclusive of sales tax and her sales were $1,000 exclusive of sales tax.The rate of sales tax is 17·5%.At the end of the week what wil sales of COST OF SALES 和COST 区别如题COST OF SALES 和 sales 的区别用英文解释谢谢！高二英语选修七第二单元 A BLOGRAPHY OF ISAAC ASIMOV 的英语原文高二英语填词sales should rise by at least 60% _the company can make a profit（销售额.提高60%,这样公司才能盈利） cost of sales与cost of goods sold 的区别 charge of international sales 高二物理闭合电路的欧姆定律问题高二坐标平面上的问题. 一段英文简历求翻译An accomplished, results-driven sales professional with over 7 years of sales experience focused on technology and telecommunications companies .问题关键是：focused on 前面是7年的销售经验,后面接的是科高二英语选修6课文A SHORT HISTORY OF WESTERN PAINTING的翻译高二英语单选题比较级问题.第五题. 高二,导数问题 An Analysis of A Winning Sales Letter的意思 capital gains on sales of stock 的翻译高二英语报纸阅读calm voice of reason翻译英语中逗号的使用问题英语中逗号不能连接两个完整的句子那么下面这个句子：Because sales of cars and light trucks made in North America declined 13.6 percent in late February,many analysts concluded that evidence of a r