Exercise 1:

1, If it hadn't been for my father's money, we couldn't have managed.

2, Hardly had I put the phone down when the boss rang back.

3, The English owe the introduction of potatoes and tobacco to WR

4, The union delegate observed that he would be very surprised if his members agreed.

5, Despite my strong disapproval of your behavior, I will help you this time.

6, I'm sorry not to have heard/attended Pro Baker's lecture.

7, The concert may have to be cancelled.

8, It came as no surprise to me that Harry had failed his driving test.

Exercise 2:

1, John blew up the tyres of his bicycle.

2, We'd better leave them a note in case they arrive later.

3, Before the came here, his previous boss was Mr. Smith.

4, He has an excellent command of German.

5, There is no justification for his criticisms.

6, I am baffled by their reluctance to sign the contract.

7, Chess problens like that always defeat me!

8, You mustn't let anyone else know this.

9, I can't afford a new dress. I'll have to make do with that old blue one.

Exercise 3:

1, Not until he came into the light did I recognize him.

2, There is no truth in that rumor about the politician and the construction contract.

3, One runner was so exhausted (that) he couldn’t (was unable) to complete the last lap of the race.

4, I’ve never known a more warm-hearted person than my mother.

5, We were never made to do anything we didn’t want to.

6, Had it not been for the death of the Prime Minister, the bill would have been passed.

7, There’s no point complaining.

Exercise 4:

1, Having supper by 8 o'clock is out of the question.

2, I see no point in further discussion.

3, Please make allowances for Jane's poor typing, she has only been learning for 1 month.