English Grammar Prepositions (on, at, in)

 Prepositions

1) I want to lose 5 kilogram                      (on, at, in) one month.
2) Could you get me this pants                      (on, at, in) a larger size?
3) She seems to be interested                      (on, at, in) Psychology.
4) I will come to pick you up                      (on, at, in) 2 pm tomorrow.
5) This class will be held                      (on, at, in) Mondays.

Answers

1) in
2) in
3) in
4) at
5) on