1. We've been invited (for, from, to) a wedding. 2. He often visits his parents on (-, a, the) Sundays. 3. Students often

1. We\'ve been invited to a wedding. 2. He often visits his parents on Sundays. 3. Students often think that exams are a nuisance. 4. When the water has boiled, turn off the gas, will you? 5. Ann has not recovered yet. She is still in hospital. 6. When did they get married? - Last year. 7. It is still raining. 8. - Who told you about it? - A friend of mine. 9. She is the best secretary that has ever worked here. 10. We arrived ten minutes ago. 11. Have you read any of Shakespeare\'s plays?