白勇书上句子结构的题目！求帮助！！！

The modernization program for the steel mill will cost approximately 51million dollars ,which it is hoped can be completed in the late 1980's。

A The modernization program for the steel mill will cost approximately 51million dollars ,which it is hoped can be completed in the late 1980's。

B The moedernization program for the steel mill, hopefully completed in the late 1980's ,will cost approximately 51million dollars .
C Modernizing the steel mill, hopefully to be completed in the late 1980's ,will cost approximately 51million dollars .
D The program for modernizing the steel mill ,which can ,it is hoped , be completed in the late 1980's and cost approximately 51 million dollars .
E Modernizing the steel mill ,a program that can ,it is hoped ,be completed in the late 1980's , will cost approximately 51 million dollars .
答案E
1.想问下D中的which的定从存在修饰歧义的问题么
2.D中把and cost 改成will cost 句子对么？will前面不加逗号！
3.E中 will cost 前面那个逗号去掉 还对么？

20. An array of tax incentives has led to a boom in the construction of new office buildings; so abundant has capital been for commercial real estate that investors regularly scour the country for areas in which to build.
(A) so abundant has capital been for commercial real estate that
(B) capital has been so abundant for commercial real estate, so that
(C) the abundance of capital for commercial real estate has been such,
(D) such has the abundance of capital been for commercial real estate that
(E) such has been an abundance of capital for commercial real estate,
答案A
说such...that...结构 such后面必须加名词才能与that搭配 所以想问下牛牛们 如果D用such...that...来改写 应该怎么用？求赐教 我知道我钻牛角尖了！
问题比较菜  但真心求帮助！

for instance, Tom is such a hermit that he hasn't left his house in two years.

by Ron
非常清楚 THX！