We have to work extra hours to finish our plan the boss can’t allow us to take a day off

问题补充：

We have to work extra hours to finish our plan, the boss can’t allow us to take a day off tomorrow.

A. so

B. or

C. and

D. but

答案：

A. so

(答案→)B. or

C. and

D. but

解析：考察连词辨析。A于是；B否则；C并且；D但是；句意：我们不得不加班来完成我们的计划，否则老板不可能允许我们明天休息的。根据句意说明B项正确。