问题补充:
By the time California to become the 31th federal state of the USA in 1850, it was already a multicultural society.
A. selected
B. collected
C. existed
D. elected
答案:
A. selected
B. collected
C. existed
(答案→)D. elected
解析:词义辨析。A. 挑选 B. 收集 C. 存在 D. 选举;推选。句意:等到1850年加利福尼亚州选择成为为美国第三十一个联邦的时候,它已经是一个多元文化的社会。故选D。