21. In scientific inquiry it becomes a matter of duty to expose a ----hypothesis to every possible kind of----.
(A) tentative.. examination
(B) debatable.. approximation
(C) well-established.. rationalization
(D) logical.. elaboration
(E) suspect.. correlation
22. Charlotte Salomon's biography is a reminder that the currents of private life, however diverted, dislodged, or twisted by ----public events, retain their hold on the----recording them.
(A) transitory.. culture
(B) dramatic.. majority
(C) overpowering.. individual
(D) conventional.. audience
(E) relentless.. institution
23. Philosophical problems arise when people ask questions that, though very----, have certain characteristics in common.
(A) relevant
(B) elementary
(C) abstract
(D) diverse
(E) controversial
24. Not all the indicators necessary to convey the effect of depth in a picture work simultaneously, the picture's illusion of----three-dimensional appearance must therefore result from the viewer's integration of various indicators perceived----.
(A) imitative.. coincidentally
(B) uniform.. successively
(C) temporary.. comprehensively
(D) expressive.. sympathetically
(E) schematic.. passively
答案：CACBE CCDBB BBDBE EBCAD ACDB