Mark Twain is famous for his book 'The Adventure of Tom Sawyer'The Smith have a dog and a cat Is this your friend? No, it isn't my friend, it is my sister This is a tree. The tree is green I can see three children. The children are playing in the yardWhat's the highest mountain in the world? He lives in ParisHe is an economist The Earth goes round the sun What a strange girl! Could you close the door, please ?We celebrate New Year on the 31st of December It is washed by the waters of the Atlantic Ocean Are you studying foreign languages at school, like the French Moscow is on the Moskva river