题目

 “鹬蚌相争”中的鹬、蚌这两种动物，体内与外界气体交换的场所分别是（    ） A 肺、肺       B肺、鳃           C肺和气囊、肺      D肺和气囊、鳃 答案：B (经典回放)For a long time they walked without saying ________ word．Jim was the first to break ________ silence． [　　] A．the; a B．a; the C．a;/ D．the;/