填空题leads^ changes→leads to changes
填空题shared
填空题it→them
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.