The words of I learned today.

I made sentences to using the words.

1.  Appoint (v) I appoint Oct 28th for meeting with my friend. ("Appoint" is usually used for more formal things and rarely used like this.)
2.  Calculate (v) I calculated the time needed to go to the school. (If you're just talking about commuting to school in general you don't need "the.")
3.  Concept (n) The school's concept is improving the English while having fun.
4.  Extend (v) I extended one's my visa.
5.  Mere (adj) The pen's price is a mere 3 dollars.
6.  Astonished (adj) It is astonishing happening.
7.  Challenge (n)(v) I'll challenge the level. 
8.  Drag (v)(n) I drag one foot after another the other because I sprained my foot.
9.  Extreme (adj)(n) The extreme rain of Vancouver.
10.  Passage (n) I run to a passage through the crowd. (Grammatically correct but I'm not sure what you mean.  Did you run through a crowd to get to a passage, or maybe "I ran through a passage in the crowd.")