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20xx大学英语四级考试模拟试题及答案
41. Vitamins are complex _______ that the body requires in very small mounts.
A) matters C) particles
B) materials D) substances
42. Apart from caring for her children, she has to take on such heavy _______ housework as carrying water and firewood.
A) time-consumed C) time-consuming
B) timely-consumed D) timely-co, 大小:7.30 MB