GWD T9-Q27

tracytrace

T-9-Q27. 大全987-606Researchduring the past several decades on the nature of language and the processes thatproduce and make it understandable has revealed great complexity instead ofunderlying simplicity.
(A) that produce and make it understandable hasrevealed great complexity instead of underlying simplicity
(B) of producing and understanding it have revealednot underlying simplicity but great complexity
(C) by which it is produced and understood hasrevealed not underlying simplicity but great complexity
(D) by which it is produced and understood haverevealed great complexity rather than underlying simplicity（A）
(E) by which one produces and understands it haverevealed great complexity instead of underlying simplicity


答案选A为何不可选C呢

tracytrace

T-9-Q41. 987-830　Ｂ
The spraying of pesticides can be carefully planned, but accidents, weather conditions that could not be foreseen, and pilot errors often cause much larger deposits of spray than they had anticipated.

A.    weather conditions that could not be foreseen, and pilot errors often cause much larger deposits of spray than they had
B.    weather conditions that cannot be foreseen, and pilot errors often cause much larger deposits of spray than
C.    unforeseeable weather conditions, and pilot errors are the cause of much larger deposits of spray than they had
D.    weather conditions that are not foreseeable, and pilot errors often cause much larger deposits of spray than
E.    ！unforeseeable weather conditions, and pilot errors often cause much larger deposits of spray than they had

答案选B,那D又为什么不行呢