【答案解析】accumulate：积累，积聚。collect：收集；积聚。Dust collected on the furniture．家具上积了灰尘。increase：增加。Japan's industrial production increased by 20% last year．去年日本工业生产增长了20%。spread：展开；蔓延。Fire spread rapidly after a chemical truck exploded．一辆装载化学物品的卡车爆炸后，火势迅速蔓延。grow：增长；长满。The path grew with weeds．小径长满了野草。