【推荐1】Knowledge can be of a great b__________ to everybody.

【推荐2】The students b________ most from school are those who are totally involved in academic life, taking full advantage of the school’s chances and resources. (根据首字母单词拼写)

【推荐3】A harmonious family is of b________ to a child’s personal development. (根据首字母单词拼写)

【推荐1】The People's Republic of China does not recognize dual (双的) ________ (国籍) for any Chinese.(根据汉语提示单词拼写)

【推荐2】The two lawyers had an ________(争论) at their very first meeting. (根据汉语提示单词拼写）

【推荐3】Man­made ________ (卫星) are used for sending and receiving messages. (根据汉语提示单词拼写)