XII. Open the brackets and use the adjective and the adverb in the comparative form.

Решение:

1. He sings better than anybody else in our school. (наречие 'well' в сравнительной степени).
2. This job is harder of all I have ever had. (прилагательное 'hard' в сравнительной степени).

Ответ: 1. better, 2. harder.