For some time, Chinese people, under the leadership of CPC, ________ the contents of the Scientific Development Concept in the course of practicing socialism in China.
A．had been improvingB．have been improving
C．were improvingD．improved
B
考察時態(tài)。根據(jù)句意可知是指中國人們一直在豐富這科學(xué)發(fā)展觀的內(nèi)容，故使用現(xiàn)在完成進(jìn)行時，表示一直在發(fā)生的事情。句意：一直以來在中國共產(chǎn)黨的領(lǐng)導(dǎo)下，中國人民一直在實(shí)踐中國特色的社會主義道路上豐富著科學(xué)發(fā)展觀的內(nèi)容。
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