单选题
The British political system has ______ over several centuries into its present state.
【正确答案】
B
【答案解析】解析：evolve(into)v.(使)进化，(使)演化：(使)发展，(使)演变(如：They evolved a new plan．The simple plan evolved into a complicated scheme．)。change v.改变，变更。expand v.扩大，膨胀，扩张。survive vi.存活下来，幸存。