Bài 2:
1. more slowly
2. more soundly
3. less traditionally
4. more generously
5. more healthily
Bài 3:
1. better
2. faster
3. later
4. harder
5. worse
6. earlier
Bài 4:
1. more optimistically
2. popularly
3. less densely populated
4. more quickly
5. more easily
6. better
Bài 5:
1. The countryside is more peaceful. / The countryside is more peaceful than the city.
2. A computer works faster at calculus. / A computer works faster at calculus than a human being.
3. Life in a remote area is harder. / Life in a remote area is harder than that in a modern town.
4. Ho Chi Minh City is more expensive. / Ho Chi Minh City is more expensive than Hue.
5. Animals can smell better than human beings.