Ответ:
1 Michael would not agree even if you asked him.
2 If they had mentioned this yesterday, everything would have been done.
3 If the plane had left on time, they would have been in Minsk now.
4 If they hadn’t walked 40 km, they wouldn't have been exhausted now.
5 What would have become of us, if I had come to you then!'
6 Molly would be a splendid woman, if only she didn't talk so much!
7 The evening will be fine, if only we don't have a storm.