XDF补充材料/SC/SECTION 11-11/21

11 The lack of complete historical records from the
mid-to-late 1800's have made some Black inventions
difficult to trace to their originators.

(A) have made some Black inventions difficult to
trace to their originators.
(B) have made for difficulties in tracing some inven-
tions by Blacks to their originators
(C) have made it difficult to trace some inventions
by Blacks to their originators
(D) has made it difficult to trace some inventions to
their Black originators
(E) has made it difficult in tracing some Black
inventions to their originators

为什么选择D而不是E?难道D的 their Black originators不是改变了原文的意思(some Black inventions)吗?

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21 Promotions, retirements, deaths, and other actions
approved by the board of directors at its May meeting
will be reported in the July 15 issue of the company
paper.

(A) Promotions, retirements, deaths, and other
   actions approved by the board of directors at
   its May meeting will be reported in the July
   15 issue of the company paper.
(B) Promotions, retirements, and other actions
   which have been approved at the May meeting
   of the board of directors along with deaths,
   with be reported in the July 15 issue of the
   company paper.
(C) To be reported in the July 15 issue of the
   company paper are the promotions, retirements,
   deaths, and other actions which were approved at
the board of directors' May meeting.
(D) Meeting in May, the promotions, retirements,
and other actions approved by the board of
directors, including obituaries, will be reported
in the July 15 issue of the company paper.
(E) The July 15 issue of the company paper will
report on promotions, retirements, and other
actions approved by the board of directors at
its May meeting; the paper will also include
obituaries.
这道题目为什么要选择E?A错在哪里呢?

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11，make it difficult to,而且Black 修饰Originator更好些。

21，A在可以用主动的情况下用了被动。

11 同意

21 death不能被board apporve