Question

I'm sorry,_____________I can't go to the movies with you 横上上的词用and还是but?

Answer 1

but
but 用于表示歉意的话语后，引起一个分句，but本身无意义。如：
I’m sorry, but I think you are wrong when you say she did it willingly.
抱歉，你说她情愿做那件事，我觉得你搞错了。
Excuse me, but are you Mr. Smith?

Answer 2

but

Answer 3

and

Answer 4

and

Answer 5

可能是but