请教几道关于比较的题

也可能以前有讨论，因为是一起看到的就一起问了。（在精华贴里）

10.A large rise in the number of housing starts in the coming year should boost new construction dollars by several billion dollars, making the construction industry’s economic health much more robust than five years ago.
(A) making the construction industry’s economic health much more robust than five years ago
(B) and make the construction industry’s economic health much more robust than five years ago
(C) making the construction industry’s economic health much more robust than it was five years ago
(D) to make the construction industry’s economic health much more robust than five years ago
(E) in making the construction industry’s economic health much more robust than it as five years ago
the key:C
比较考点——比较对象
the construction industry's economic health is much more robust than it was five years ago

was 前面没有对应的动词，怎知补出的是was？

than 之前和之后不具备可比较性；it 代 the construction industry's economic health；补出was 好和时间相连
71.Aging is a property of all animals that reach a fixed size at maturity, and the variations in life spans among different species are far greater as that among individuals from the same species: a fruit fly is ancient at 40 days, a mouse at 3 years, a horse at 30, a man at 100, and some tortoises at 150.
(A) among different species are far greater as that among individuals from
(B) among different species are far greater than that among individuals from
(C) among different species are far greater than those among individuals of
(D) between different species are far more than that between individuals of
(E) between different species are greater by far than is that between individuals from
the key:C
比较考点——比较对象
variations in life spans among different species——those among individuals of the same species

为使么不是 省略those,直接比 among...？

variations in life spans among different species 这个有among 得限制已经表示一个“子集”了，后面是另外一个“子集”，所以those省不得

82.Although he is as gifted as, if not more gifted than, many of his colleagues, he is extremely modest and his poetry is unpublished.
(A) Although he is as gifted as, if not more gifted than, many of his colleagues, he is extremely modest and his poetry is unpublished.
(B) Although he is as gifted, if not more gifted, than many of his colleagues, he is extremely modest and with his poetry remaining unpublished.
(C) Although he is as gifted as, if not more gifted than, many of his colleagues, he is extremely modest and will not publish his poetry.
(D) Despite his being gifted, if not more gifted than his colleagues, he is extremely modest and will not publish his poetry.
(E) Being a gifted as, or more gifted than, many of his colleagues, he is extremely modest and his poetry is unpublished.
the key:C。
比较考点：as----as; more---than-----

时态的改变又无根据，a 不好的原因是什么？

句意是最大的根据，时态不变，逻辑上就有问题；

A，and 连接两个句子，可以分成although he——，his poetry——. 这样主语就冲突了。