You earn a point _______ you answer a question correctly. Which is WRONG?

Was it from Mary, _______ was working at a department store, ______ you learned the news?

I had no one ___ me, for I could deal with it all by myself.

We have bags ________ red and black ________ 10 dollars each.[ ]

Jim! Is this your dictionary?—No, it isn’t. Ask Sally. She is looking for_______.