Scientists have found ______ that shows that the first people in our country sailed here in small wooden boats.
[2] A team of scientists will _______ the kinds of tools in an ancient site.
[3] The primitive tools were used to ______ the Mayan pyramids in Mexico.
[4] Tonight, rescue workers ______ for three climbers who are lost on the top of the mountains.
[5] Along with the people in the old tombs, archaeologists found the _______ of horses, dogs, and other kinds of animals that they used.
[6] We don't know exactly what happened to Amelia Earhurt when she was flying across the Pacific. Some people _______ that she landed on a small island.
[7] Archaeologists have learned about ______ people by studying their tools, food, and weapons.
[8] Scientists have _______ how people moved the big stones to build that temple.
[9] Scientists ______ that people used boats and carried the stones on the river.