I. Find mistakes in the following sentences. Explain your choice.
1. His parents said their son had been born in 1989.
2. He agreed that the Earth was ellipsis not round.
3. The speaker mentioned that he had taken part in that conference in 1999.
4. The boys remembered they had met on April 11.
5. The teacher repeated that water boiled at 100 degrees.
6. He found out that the sun had been a planet.
7. He said snow was cold in any time.
8. The schoolgirls told their friend they had seen each other for the first time on the first of September.
НЕ ЗАБУДЬТЕ ОБЪЯСНИТЬ СВОЙ ВЫБОР!

What are the two 'most American’ holidays? Fill in the gaps the correct prepositions.
Americans have a big party on Independence Day. Some towns and cities have parades with music bands and flags _on__ the Fourth of July. The atmosphere of the family party, with hot dogs and hamburgers _in_ the afternoon and the fireworks _at_ night makes the Fourth of July a national birthday party. Thanksgiving Day is _on_ the fourth Thursday _in_ November. People started to celebrate it _in_ 1621. _On_ Thanksgiving all people in the family gather in the house of their parents and eat a large traditional dinner.

What are the two 'most American’ holidays? Fill in the gaps the correct prepositions.
Americans have a big party on Independence Day. 

Some towns and cities have parades with music bands and flags _on__ the Fourth of July. 

The atmosphere of the family party, with hot dogs and hamburgers _in_ the afternoon and the fireworks _at_ night makes the Fourth of July a national birthday party. 

Thanksgiving Day is _on_ the fourth Thursday _in_ November. 

People started to celebrate it _in_ 1621. _On_ Thanksgiving all people in the family gather in the house of their parents and eat a large traditional dinner.