Choose the best anwser

1. Sarah is ..........................at chemistry than Susan.
A. good B. well C. better D. best
2. I don’t work so hard .......................my father.
A. so B. as C. than D. more
3. Sam is the ..........................student in my class.
A. tall B. most all C. taller D. tallest
4. No one in my class is ..........................beautiful..........................her.
A. as/as B. more/as C. as/than D. the/more