Поставьте артикль the, если необходимо. 1. In ... Great Britain ... Monday is ... second day of a week

In Great Britain Monday is the second day of a week. - В Великобритании понедельник - второй день недели.

The is definite article. We don't use it with the names of country. Great Britain, England, Scotland. We use definite article when there is united in the name of country. (The United Stated of America, the United Kingdom of Great Britain).

We don't use definite article with days, Sunday, Monday.

We use definite article with Ordinal Numerals (the first, the fifth, the second).