填空题leads∧changes→leads to changes

填空题it→them

填空题shared

单项选择题A．Persian Gulf, Pakistan and ChinaB．Persian Gulf, Pakistan and IndiaC．Pakistan, India and China.D．Persian Gulf and Pakistan

单项选择题A．They could work for 24 hours a day.B．They were worse hunters.C．They were more persistent hunters.D．They worked the whole night.