I don't know
1)there are more holidays in Britain than in Russia.
2)British people eat special food on the New Year's Eve.
3)it usually snows in London in winter
4)there is a special song people sing when they see the New Year in.
5)St Valentine's Day is popular with young people.
6)they give chocolates to those they love.

1) There are more holidays in Britain than in Russia. - Wrong. 2) British people eat special food on the New Year's Eve. - True. 3) It usually snows in London in winter. - Wrong. 4) There is a special song people sing when they see the New Year in. - True. 5) St Valentine's Day is popular with young people. - True. 6) They give chocolates to those they love. - Thue.

I don't know 1)I don't know if there are more holidays in Britain than in Russia.Я не знаю, есть ли больше праздников в Великобритании, чем в России 2) I don't know if British people eat special food on the New Year's Eve.  - Я не знаю,   едят ли британские  люди  особую пищу в канун Нового года. 3) I don't know if  it usually snows in London in winter  -  Я не знаю, если ли, как правило, снег в Лондоне зимой 4)  I don't know if there is a special song people sing when they see the New Year in.  Я не знаю, есть ли специальная песня  которую поют, когда они встречают Новый год в. 5)  I don't know if St Valentine's Day is popular with young people. - Я не знаю, популярен ли среди молодежи день Святого Валентина . 6)  I don't know if  they give chocolates to those they love.  - Я не знаю,  они дают ли конфеты тем  кого они любят.