"Preposition"

Mr. Thomas Karyadi walks (over / into)

I became an author (in / at) the age of 40

My dog passed (away / over) in Bukit Tinggi in 2002

Please come (by / on) time unless we will leave you.

I go (on / by) foot to my house because my house is near the bank.

Our class ends (in / at) the afternoon.

Do you stay (on / in) Langkat Street no 88?

He will celebrate her birthday (in / on) the USA

The examination will be held (on / at) March 25th.

You never take a bath (at / in) the morning.