Ответ:
1) Unless Tom
gives his library book back, he (will have) to pay a fine.
2) If the earth
suddenly (stopped) spinning, we all would fly off it.
3) If I knew that
dogs were allowed in the hotel, I (would bring) my dog.
4) If I had known
your problems with money I (would have lent) you some.
5) If you finished,we
(would go) for a walk.
6) The ice (will shatter)
if you walk on it, it’s too thin.
7) If I (had) a
university degree I wouldn’t be sitting in this office.