(A) the local witnesses are difficult to locate, reti­cent, and are

(B) local witnesses to be difficult to locate, reticent, and are

(C) that local witnesses are difficult to locate, reti­cent, and

(D) local witnesses are difficult to locate and reti­cent, and they are

(E) that local witnesses are difficult to locate and reticent, and they are

答案是C

be

difficult to locate

reticent

supicious的并列。

可是我觉得后面两个可以直接修饰witnness，即，witnness are reticent and supicious,可总不能说witnness are difficult吧。这样并列也叫并列？？

local wit­nesses are (1) difficult..., (2) reticent, and (3) suspicious...

local witnesses are difficult to locate

目击者是难于被locate,(目击者是）reticent,(目击者是）suspicious的

from Longman

suspicious adj.

1.thinking that someone might be guilty of doing something wrong or dishonest
suspicious of
eg. Some of his colleagues at work became suspicious of his behaviour.