Which location served as the headquarters for general washington’s troops during the winter if 1777-1778

Which fact would this be, and how might you verify the truth?

Which two sentences in this passage talk about china’s efforts to curb environmental degradation?

How were the okanogan highlands formed? a. by subduction, which caused huge folds in earths surface b. as a result of retreating glaciers carving great valleys into the earth c. when molten rock from under the earth approached the surface d. when the collision of volcanic island chains and ocean rocks formed new earth