There is never enough time to do everything there is always enough time to do the most i

问题补充：

There is never enough time to do everything, there is always enough time to do the most important thing.

A. and

B. but

C. or

D. so

答案：

A. and

(答案→)B. but

C. or

D. so

解析：考查连词。根据句意，前后句之间为转折关系。句意：没有足够的时间来做一切，但总是有足够的时间来做最重要的事情。故B正确。