Исправить ошибки в предложениях и расписать причину:

1. My wife and I are starting to think we should stay at home (to think)

2. The animals frightened by a loud noise. (frightened)

3. The thieves saw by anyone. (saw)

4. The university will close next year. (will close)

5. She works for this firm since she left school. (works)