Uzupełnij zdania czasownikami w poprawnej formie:

1. There .......... (be) lots of complaints about his behaviour since he .......... (begin) attending the classes last month.

2. Nobody .......... (pay) any attention to the damaged wiring until one member of the staff .......... (be) electrocuted last Friday.

3. Brian .......... (work) really hard. He used to come back home after midnight.

4. I cannot tell you much about this author. I .......... (never / read) any of his books.

5. Why don't you switch the alarm-clock off? It .......... (ring) for twenty minutes now.

6. I realised something wrong .......... (go on) as soon as I .......... (hear) these wild screams.

7. Isn't it high time you .......... (return) the pliers?

8. 'How often .......... (Bill / have to) feed his goldfish?' 'Twice a day.'

9. We .......... (arrange) everything for you by the time you .......... (arrive) home next Sunday.

10. Don't be afraid. Nothing wrong .......... (happen) as long as you .......... (obey) all the regulations.