Great changes in China since the People's Republic of China _ in 1949．（　?。?/h1>

A．have taken place； was founded

B．has taken place； was founded

C．have been taken place； founded

D．took place； founded

【答案】A

【解答】

【點評】

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Great changes ______in China since the People's Republic of China _______ in 1949．（ ?。?/h1>