[求助]请教XDF 16-#20和 18-#12两题

kerili

section 16-#20:
According to the national pasta association, per capita consumption of pasta in the united states, which has already been approaching 19 pounds a year, will achieve 30 pounds a year by the twenty-frist century.
A)
E) According to the national pasta association, per capita consumption of pasta in the united states is already approaching 19 pounds a year and will reach 30 pounds a year by the twenty-first century.

这里为什么用进行时，而不用完成进行时呢?记得 is doing有表将来的意味，我理解是不是说一般现在时和一般将来时连用要比完成时和将来时连用更smooth些呢？

section 18-#12
Although dozens of New York's samll museums are either devoted to local history or various ethnic groups, there are many one-of-a-kind museums from Manhattan to the Bronx that are open for exploration on summer weekends.
A)
C) Dozens of New York's samll museums are devoted to local history or various ethnic groups, but there are

A)中的or之后是可以省略devoted to 还是devoted? 那么C 有什么问题吗？前半句是少了either还是okay？

谢谢！

kerili

怎么都没人回呀？

kerili

刚下载了刘证明的语法三，上面提到第一题，问题出在句中which指代错误，句中which变成指代the united states了。

fair_sword

12题：  local history or various ethnic groups 是平行的，一起做devoted to 的宾语，而且该题主要是句意的理解。

kerili

刚才看到piloteer的语法笔记里提到，第二题的答案又变成了D
D) Dozens of NewYork's small museums are devoted to local history or various ethnic groups, and there are also

但本人觉着这个答案改变了原句意，原句中要表达的是转折之意？