Используйте such или so в этих предложениях: The meal is tasty.

His arms are strong.

The rules are useful.

The film is long.

This is important.

The children are healthy and fit.

The meal is so tasty. His arms are so strong. The rules are so useful. The film is so long. This is so important. The children are so healthy and fit.

so используется перед прилагательным и наречием, в то время как such стоит только перед существительным.