This (6) injecting a microchip the size of a (7) of rice into the trunk of each tree. A. crumb B. speck C. bean D. grainĐoạn văn7/80This (6) _____ injecting a microchip the size of a (7) _____ of rice into the trunk of each tree.crumbspeckbeangrainGiải thíchĐáp án: D