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　　新GRE填空题型练习(第53天)

　　1. Burke is often on slippery ground when it comes to her primary sources; especially ______ is the mode by which she gathered her oral evidence.

　　A. crucial

　　B. passable

　　C. dubious

　　D. laudable

　　E. ingenious

　　2. Although grandiose urban railroad stations are often viewed as glorious monuments to their cities, they in fact ______ the cities by enabling the migration of city dwellers to the suburbs.

　　A. invigorate

　　B. enlarge

　　C. enfeeble

　　D. delineate

　　E. overshadow