Вместо точек нужно вставить at, on или in: 1. The celebration is ... Sunday. 2. In Great Britain Cristmas is ... December.

1. The celebration is on Sunday. 2. In Great Britain Christmas is in December. 3. The English lessons are on Tuesday. 4. It\'s my sister birthday on Friday. 5. The test is on Wednesday. I\'ll have a lot of work at the weekend. 6. The school starts in September.