for some time now, Chinese people .under the leadership of C

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/04/29 19:00:45

for some time now, Chinese people .under the leadership of CPC,____the contents of the scientific development theory in the course of practicing socialism in China.
A had been improving B have been improving C were improving D improved
the answer is B,翻译下和解释

For some time now, Chinese people, under the leadership of CPC,____the contents of the scientific development theory in the course of practicing socialism in China.
A had been improving B have been improving C were improving D improved
答案为B.
解释：介词 for + 时间,可以表示（做某事）持续了多少时间,常用在现在完成时的句子中做时间状语.本句中的时态是现在完成进行时（由“have /has been + 现在分词”构成）,其用法与现在完成时基本相同,不过更加强调动作的持续和进行.再举一例：She has been talking for 3 hours. （她一刻没停地说了三个小时了.）
翻译：一段时间以来,在中国共产党的领导下,中国人民在实践中国特色社会主义的过程中不断丰富完善科学发展观的内容.

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