John is an excellent boss（）he is looked up to by all of his empl

John is an excellent boss（）he is looked up to by all of his employees.


A、

but


B、

and


C、

while


D、

or


【正确答案】：B
【题目解析】：

John是个优秀的老板，他受到所有员工的尊敬。由句子可知括号前后为两个独立的句子，而且是并列的关系，因此用and来连接。