265. During the first year after the corporate reorganization, no one considered the management was well-organized; managers were largely untrained and directionless.
(A) was well-organized
(B) well-organized
(C) were well-organized
(D) seemed to be well-organized
(E) seemed well-organized

269. During the Renaissance, scholars were uncertain as to the location of Troy, and by the eighteenth century many historians doubted that Troy had ever existed.
(A) doubted that Troy had ever existed
(B) doubt that Troy has ever existed
(C) were in doubt as to the existence of Troy
(D) were doubtful concerning Troy’s existence
(E) had doubts about Troy’s ever existing

276. Erasmus Montanus, a seventeenth-century farce written by Ludwig Holberg, both predates and resembles Moliere’s Tartuffe and is therefore thought to be one of Moliere’s sources.
(A) both predates and resembles
(B) it both predates and resembles
(C) both predated and resembles
(D) has both predated and resembled
(E) because it both predated and resembled

278. Europeans have long known that eating quail sometimes makes the eater ill, but only recently has it been established that the illness is caused by a toxin present in the quail’s body only under certain conditions.
(A) Europeans have long known that eating quail sometimes makes
(B) Europeans have long known quail eating is sometimes able to make
(C) Eating quail has long been known to Europeans to sometimes make
(D) It has long been known to Europeans that quail eating will sometimes make
(E) It has long been known to Europeans that quail, when it is eaten, has sometimes made

you guys got it all right. But for 269 isnt that past perfect? so something had to stoped before another action begain.

Isnt Eurpeans plural so the verb "makes" should be "make"?