大全531 还有一点疑问

531New techniques in thermal-scanning photography, a process that records radiation from surface areas, makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before.   

(A) makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before

(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before

(C) have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river

(D) make possible the study of the effects of calefaction, or warming, of a river in greater detail than it ever was before（C）

(E) has made it more possible than ever before to study in greater detail the effects of calefaction, or warming, of a river

为什么要用完成时？现在是就可以了啊

各选项主要问题：

A）错在makes与主语单复不一至

B）in greater detail 与than ever before 不能分隔

D）in greater detail than it ever was before 不符合习惯用法，than ever before, than before都可以

E）has made 主谓单复不一致，而且出现 more possible和 in greater detail 两个比较内容。好像大部分的比较都是一次比较一个内容，如果有两个则分开表示，如：

1.        The development of a new jumbo rocket that is expected to carry the United States into its next phase of space exploration will be able to deliver a heavier load of instruments into orbit than the space shuttle and at a lower cost.

(A) The development of a new jumbo rocket that is expected to carry the United States into its next phase of space exploration will be able to deliver a heavier load of instruments into orbit than the space shuttle and at a lower cost.

(B) The development of a new jumbo rocket is expected to carry the United States into its next phase of space exploration and be able to deliver a heavier load of instruments into orbit at a lower cost than the space shuttle.

(C) The new development of a jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit at a lower cost than the space shuttle.

(D) A newly developed jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit than the space shuttle can, and at a lower cost.（D）

(E) A newly developed jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit than the space shuttle and to cost less.

我看到这道题的第一反映是关于状语部分的比较。对于主语或谓语的比较都讲究平行，但是状语的比较如何平行？in greater detail......than (it was) before?

宾语后置.正常语序应该是:made it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before.

GWD有一道类似的题.

我的理解是:calefaction(加热,发暖,温暖)应该是与warming平行.

所以:the effects of calefaction, or warming, of a river = the effects of calefaction of river or the effects of warning of river.