掌握了GRE阅读里的长难句，到了实战演习的时候了。GRE阅读练习帮助GRE考生循序渐进地进行复习和总结。希望GRE考生在进行GRE阅读练习时，也按着考试时候的时间规定自己的练习，这样才能有效果。
Over a period of several months, researchers attached small lights to the backs of wetas—flightless insects native to New Zealand—enabling researchers for the first time to make comprehensive observations of the insects' nighttime activities.Thus, since wetas forage only at night, the researchers' observations will significantly improve knowledge of the normal foraging habits of wetas.
Which of the following is an assumption on which the argument depends?
(A) Researchers were interested only in observing the wetas' foraging habits and so did not keep track of other types of behavior.
(B) No pattern of behavior that is exhibited by wetas during the nighttime is also exhibited by wetas during the daytime.
(C)Attaching the small lights to the wetas' backs did not greatly alter the wetas' normal night- time foraging habits.
(D)Wetas typically forage more frequently during the months in which the researchers studied them than they do at other times.
(E)The researchers did not use other observational techniques to supplement their method of using small lights to track the nighttime behavior of wetas.
答案：C
