4. There's some doubt        he'll keep his promise.

3. Please tell me        the accident came about. I am still in the dark.

2. How many years is it        your sister came to work here?

1. It is known to all that this result is        the recent negotiations.

10. It is not the children but their father who is       (blame) for this accident So don't shout at them!

9. In my profession as an        (educate) and health care provider,I have worked with numerous children infected with the virus that causes AIDS.

8. I have worked with children before,so I know what       (expect) in my job.

7. Do you advocate        (ban) cars in the city centre?

6. As it turned out to be the most important meeting in the year,you shouldn't have dressed up so        (casual) .

5. Nowadays a certain limit should be set on the use of cars to reduce air        (pollute) .