1) you can't visit the United States unless you get a visa
=>If you get a visa, you can't visit the United  States.

2.'can I borrow your typewriter, Janet?' asked Peter
=> Peter asked if i borrowed his typewriter.

3.She started working as a secretary fiver years ago
=>She has started working at a secretary for five years.

4.My French friend finds driving on the left difficult
=> My French friend isn't easy to 

5.They think the owner of the house is abroad
=>The owner

6.We didn't go on holiday because we didn't have enough money
=>IF we

7.The children couldn't go swimming because the sea was very rough
=> the sea was too

8.What a pity you failed your driving test!
=>I wish you  didn't fail  your driving test. 

9.The mechanic serviced my car last week
=>I

10.I'm always nervous when I travel by air
=>Traveling

11.He could not afford to buy the car
=>The car couldn't  be afforded to buy by him

12.'Why don't you put your luggage under the seat?' He asked
=> He suggested me should put my luggage under the seat.

13.Although he had a good salary, he was unhappy in his job
=>In spite of

14.He was annoyed because his secretary came late to work
=> He objected

15.I'm sorry I missed your birthday party
=> I wish i didn't miss  your birthday party.

16.They haven't cleaned the streets this week
=> the streets haven't been cleaned this week

17.Apples are usually cheaper than oranges
=> Apples are not more expensive than oranges.

18.I advised you to put your money in the bank
=>You'd  put your money in the bank.

19.That restaurant is so dirty that no one wants to eat there
=> It is such

20.John only understood very little of what the teacher said
=>John could hardly

21.Unless someone has a key, we can't get into the house
=>We can only get

22.I'm sure you didn't lock the front door. Here's the key
=>you can't

23.He prefers golf to tennis
=>He'd rather

24.He's sorry now that he didn't invite Molly to his party
=> He wishes he  invited  Molly to his party

25.Bring your swimming things in case it's sunny
=> He told

26.There's no need for you to talk so loudly

=>you don't

27.I haven't been to Britol for three years
=> The last time, 

28.No one has signed this cheque
=> this cheque hasn't been signed

29.Jim will be 18 next week
=> It's Jim's

30.Unless he phones ummediately, he won't get any information
=> IF

31.How long is it since they bought the house
=> when did they  buy the house?

32.He couldn't repair the broken vase
=>The broken vase couldn't be repair by him.

33.The garden still needs digging
=> The garden has not

34.Have you got a cheaper carpet than this
=> Is this

35.I can't get my feet into these shoes
=> These shoes can't be gotten my feet into

36.I'm very pleased that we shall meet again soon
=> I'm looking forward to meeting from our .

37.Keep away from this area said the security guard when we approached the fence

=> the securyty guard told

38.I've never met such a famous person before
=> It's

39.This pudding can be cooked in its tin
=>You don't

40.It was so late that nothing could be done
=> It was too