It has been proved_______eating vegetables in childhood helps to protect you against serious

illnesses in later life.[ ]

A. if                        

B. because

C. when                      

D. that

加强公民道德建设具有哪些重要意义.

A、是我国道德建设的重大成果。 

B、是“以德治国”的重要方面 

C、是发展社会主义市场经济的客观要求。 

D、推进了我国公民道德建设的进程。