During the 1980's approximately $150 billion in private investment capital is estimated to have left Mexico and added to the strain on the country's debt-ridden economy.
(A) During the 1980's approximately $150 billion in private investment capital is estimated to have left Mexico and added
(B) During the 1980’s it is estimated that approximately $50 billion in private investment capital left Mexico and added
(C) It is estimated that there was approximately $50 billion in private investment capital that left Mexico during the 1980’s and added
(D) It is estimated that during the 1980’s approximately $50 billion in private investment capital left Mexico, adding
(E) Approximately $50 billion in private investment capital is estimated as having left Mexico during the 1980’s, adding
Answer: D
问题：1. capital能够自己来left和add吗？2.D里面把adding换成and added可不可以？这里的left和add不是明显有前后关系吗？我记得OG里有一道题：
The only way for growers to salvage frozen citrus is to process them quickly into juice concentrate before they rot when warmer weather returns.
(A) to process them quickly into juice concentrate before they rot when warmer weather returns
(B) if they are quickly processed into juice concentrate before warmer weather returns to rot them
(C) for them to be processed quickly into juice concentrate before the fruit rots when warmer weather returns
(D) if the fruit is quickly processed into juice concentrate before they rot when warmer weather returns
(E) to have it quickly processed into juice concentrate before warmer weather returns and rots the fruit
OG里解释returns and rots…就是：E expresses the cause-and-effect relationship between the return of warmer weather and the rotting of the fruit. 如果照上道题的答案，是否这里也可换成The only way….before warmer weather returns, rotting the fruit？
Thanks a lot!
1.应用it is estimated that ...的句型，因为如果把During the 1980's 提前，动词不应用is , 而应用was,所以选项ABE都不对。
2.leave不能用被动，add to可用add sth1 to sth2的结构，也可用sth1 add to sth2的结构，后者表示sth1更增加sth2
3.此句adding改为and （thus) add也是对的，但og中的那一道题不能改为rotting,因为那样会造成rotting的逻辑主语不清楚。
[em12]
