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With the development of science and technology, people’s life _______ in the past few years.
A．improvedB．has improved
C．is improvingD．had improved
　選B。
根據(jù)句子后面的時(shí)間狀語in the past few years可以知道句子應(yīng)該使用現(xiàn)在完成時(shí)。
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