语法填空（共10题，每题1分，满分10分）
______(exact) when the first people arrived in what we now know as California，no one really knows. However,______is likely that Native Americans were living in California at least fifteen thousand years ago.
Scientists believe that these first settlers______ (cross) the Bering Strait in the Arctic to America _______ means of a land bridge which existed in prehistoric times. In the 16th century, after the _____ (arrive) of Europeans, the native people suffered greatly. Thousands were killed or forced into slavery. In addition, many died_____ the diseases brought by Europeans. However, some survived these terrible times, and today there are more Native Americans ______  (live) in California than in any other state.
In the 18th century, California was ruled by Spain. Spanish soldiers first arrived in South America in the early 16th century. Two centuries later, the Spanish had settled in most parts of South America and along the northwest coast of _______ we now call the United States. Of ______ first Spanish to go to California, the majority were religious men, whose ministry was _______(teach) the Catholic religion to the natives.