题目

_________ shirts are both on _________ desk． A．Tom's and John's；Mary and Jane's            B．Tom and John's：Mary's and Jane's C．Tom's and John's；Mary's and Jane's          D．Tom and John's；Mary and Jane's 答案：A蔬菜作物是可供人们佐餐的草本植物的总称，其种类很多，如根菜类、茎菜类、叶菜类、花菜类和果菜类等，菜豆就是蔬菜作物。白菜、胡萝卜、土豆、黄瓜、茄子、菠菜、蒜、菜花、豆角、辣椒、姜等，它们分别属于哪一类？