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 improvedthe answer is B,翻译下和解释
问题描述：
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
答
A.不用过去时
B 已经 并且还在
C "for some time now" 要用现在完成时的
D 不对
答
在中国*实践的过程中，在中国*领导下的中国人民历经时日，一直致力于完善科学发展观的内容。
因为前面用的是for some time now 到现在为止有一段时日，所以后面要跟现在完成时，ACD的时态都不对。B用的是现在完成进行时，表示这一完善过程已经进行了一段时间，并且还在进行中。
不明白的再问哟，望及时采纳，多谢！
答
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 i...