1.

We didn't stay long at the party because it was very noisy.

so

If noise, we might have stayed longer at the party.

2.

The number of people applying for university grants fell last year.

fall

There number of people applying for university grants last year.

3.

Mr Conrad's son is becoming quite well known as an artist.

name

Mr Conrad's son is making himself as an artist.

4.

Would you mind helping me carry this heavy box to the car?

grateful

This box is really heavy so I'd help me carry it to the car.

5.

'Excuse me madam, but is this your bag?' the policeman asked.

belong

'Excuse me madam, but ?' the policeman asked.

6.

By the time we got to the sale, every book had been sold.

single

By the time we got to the sale, there book left.

7.

Rosa found it very difficult to persuade her boss to give her a pay rise.

great

Rosa had her boss to give her a pay rise.

8.

The man claimed that he had been nowhere near the factory at the time of the break-in.

to

The man claimed not near the factory at the time of the break-in.