4. The modern wind turbine works the ...a .more efficiently
b. most efficiently
c. efficiently
d. efficientlier
5. He has the ... house among all his friends.
a. Big
b.more big
c. bigger
d. biggest
6. I have no idea. Why he spoke ... than before.
a. More gently
b. Gently
c. Gentlier
d. gentliest
7. Santy is as ... as her sister
a. More beautiful
b. Most beautiful
c. beautifulier
d. beautiful
8. Only I could find the ... path from node x to node y.
a. Easiest
b. More easy
c. Easier
d. most easy
9. The man treated his stepchildren ... than animals.
a. Badly
b. Worst
c. Worse
d. ugly
10. Your spicy ramen noodle is ... than mine
a. Hot
b. Hotter
c. Hottest
d. more hot
11. Mathematic is the ... subject for me.
a. Difficulter
b. More difficult
c. Difficultest
d. Most difficult​