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231. The returns in the short _____ may be small, but over a number of years the investment will be well repaid. A. interval B. range C. span D. term 232. A thorough study of biology requires _____ with the properties of trees and plants, and the habit of birds and beasts. A. acquisition B. discrimination C. curiosity D. familiarity 233. She worked hard at her task before she felt sure that the results would _____ her long effort. A. justify B. testify C. rectify D. verify 234. Im very glad to know that my boss has generously agreed to _____ my debt in return for certain services. A. take away B. cut out C. write off D. clear up 235. Some journalists often overstate the situation so that their news may create a great _____. A. explosion B. sensation C. exaggeration D. stimulation 答案： 231. D 参考译文：这个投资就眼前来说回报可能很小，但若干年后，它的回报将是丰厚的。 interval 间隔, 距离, 幕间休息 | 
