题目

27. We haven’t settled the question of ____ it is necessary for him to study abroad.    A. if        B. where     C. whether    D. That 答案：B2．图中数字序号与我国甜菜种植区对应正确的是（　　）A．①-塔里木盆地B．②-河套平原C．③-华北平原D．④-辽河平原