【正文】
singing together in chorus? A. The act of calling each other. B. The sense of acplishment. C. The act of hunting for something. D. The sense of belonging to a group. 56. Why does Harrington think the “social bond” theory may be wrong? A. Wolves separate from each other after howling. B. Wolves tend to protect their hunting grounds. C. Wolves sometimes have quarrels after howling together. D. Wolves of low rank are encouraged to join in the chorus. 57. Researchers are sure that wolves often howl to______. A. show their ranks B. find their panions C. report the missing ones D. express their loneliness 58. “Howling? is a contagious behaviors”(in the last paragraph)means_______. A. howling is a signal for hunting B. howling is a way of munication C. howling often occurs in the morning D. howling spreads from one to another 板書(shū)設(shè)計(jì) 當(dāng)堂作業(yè) 課外作業(yè) 教學(xué)札記