The Country Wife (1977)
If you have read the play you should give it a try, it is funnier than the text.Acting is very good in general, although I think the guy who plays Horner is younger than what he is supposed to be. I found it in youtube and you can check it out as well since it has eng subs as an option. If you are not British or just not have English as mother tongue you might need it because they speak very quickly, which was a little sad because I did not have the chance to remember what I had read and process everything that happened. That's why I recommend to watch it you have read the play first. Generally the dialogue is not much different from the original play and it is well adapted. My only complaint was the China scene that it is not as explicit as it should have been and generally it is very indirect, no relation with that of the comedy text. But then I found the exact China scene of the same movie in a separate youtube video so I guess they decided to create two versions of it. For sure the explicit one is better and to the point.