参考答案

正确答案：D
解析：本句意思：政府正致力于增强两国的互相了解。raise，increase，heighten都有“提高”的意思。如：When he saw the principal, he raised his hand in salutation．他看到校长时举手敬礼。It's the music to heighten the dramatic effect．那是用于提高戏剧效果的配乐。promote：促进、推动，最符合题意，例如：They promoted him to be a general．他们将他提拔为将军。