—Remember this, children. _______ you study, _______ knowledge you will get.

—We know, Mr. Green. [ ]

A. The harder, the less

B. The hard, the more

C. The harder, the more

D. harder, more

社会主义社会是物质文明、政治文明和精神文明相辅相成、协调发展的社会。只有三者协调发展，才是中国特色的社会主义。[ ]