Complete the sentences with the comparative form of the adjectives, adding than where necessary.

1 I usually do my homework in the school library because my home internet is ... \(slow\) my school's and my house is ... \(noisy\).
2 Exams these days are ... \(hard\) they were in the past, but the preparation classes are ... \(good\).
3 Most teenagers wear casual clothes, partly because they're ... \(fashionable\) these days and also because they're ... \(cheap\) formal clothes.