GWD 31-37,41 NN帮忙看一下吧~~

37. GWD31-37

In 1994 the white house named Dr RuthR. Faden chairperson of the federal advisory committee of experts they assigned to do a report on the history and ethics of the government’s radiation experiments on humans in the 1950’s and 1960’s .

A.          they assigned to do

B.          to be assigned doing

C.          that was being assigned doing

D.          assigned for doing

E.          it assigned to do

答案选 E  可不可以分析下这道题~~

Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over north America,
                they are named for the New Mexico site where they were first discovered in 1932.

A.          Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over north America, they are named for the New Mexico site where they were first discovered in 1932.

B.          Although named for the New Mexico site where first discovered in 1932, Clovis points are spear points of longitudinal grooves chipped onto their faces and have been found all over north America .

C.          Named for the New Mexico site where they have been first discovered in 1932, Clovis points, spear points of longitudinal grooves chipped onto the faces, have been found all over north America .

D.          Spear points with longitudinal grooves that are chipped onto the faces ,Clovis points , even though named for the New Mexico site where first discovered in 1932, but were found all over north America .

E.          While Clovis points are spear points whose faces have longitudinal grooves chipped into them, they have been found all over north America, and named for the New Mexico site where they have been first discovered in 1932

答案选 A ，C 为什么不行呢？

第一个 IT 代 前面的white house  必须用单数， assigned to do 表目的更prefer， 划线部分整个做experts的定语  省略that

第二个 每个选项意思都不同， 暂不说C D有语法硬伤。

       A 说虽然。。都在北美发现， 但以墨西哥的地方命名

       C 选项一马平川， 直接说什么什么东西在北美发现