1 Pete is the least helpful person of all.
a less b little c the least
2 The more you exercise, the fitter you'll become.
a fit b fitter c fittest
3 Emma is not as funny as her sister.
a funny as b funnier than
4 This T-shirt is much cheaper than the blue one.
a much b very c lot
5 As Ivan grew up, he got taller and taller.
a the tallest b taller c tall
6 Tom is slightly older than his brother.
a slightly b little c by far