Unit One
1.shouldn't have been to the cinema last night
2.would have; told him the answer
3.theyneedn't have gone at all
4.musthave had too much work to do
5.might have been injured seriously
unit 2
1.itis a wonder to find
2.Itis a surprise for us to find
3.itis a waste of time to argue with him
4.It'sa comfort to know
5.Itis a relief for us to learn
unit 3
1.Hetried sending her flowers,but it didn't have any effect.
2.Idon't regret telling her what I thought,even if I upset her.
3.Thewindow was broken because I forgot to close it when I left.
4.Weregret to inform you that the materials you ordered are out of stock.
5.Hewelcomed the new student and then went on to explain the college regulations.
unit 4
1.Petrol now is twice as expensive as it was a few years ago.
2.Theirs is about three times as big as ours.
3.Latin American customers talk two to four times as long on the phone as peoplein North America.
4.thefee for cell phones is typically twice as much as for calls made over fixedlines
5.cantransmit 250,000 times as much data as a standard telephone wire
unit 5
1.Youmight as well go there to see whether there is the information you need.
2.Wemight as well call it freedom.
3.Youmight as well ring and tell them you're going to visit them.
4.Wemight as well walk home.
5.Wemight as well find an easier one to read.