题目

 The number of cranes ____ getting ____. If we don’t help them, they will disappear soon. A. are; fewer and fewer                                    B. is; smaller and smaller C. are; smaller and smaller                                 D. is; fewer and fewer 答案：B珠江三角洲地区与西双版纳地区同属于（　　）A．南方地区B．北方地区C．西北地区D．青藏地区