His classmates offered him their congratulations ______ his successful performance.
As far as I am concerned, education is about learning and the more you learn, _______.
John shut everybody out of the kitchen _________ he could prepare his grand surprise for the party.
—Did you remember to give Marry the money you owed her?—Yes, I gave it to her _______ I saw her.
The man will have to wait all day _______ the doctor works faster.
Although he was in poor health, Robert succeeded ______ other more famous engineers failed.