a. Last night, I went to the bed / bed very early; I was so tired!

b. He wrote to bank / the bank to apply for an authorized overdraft.

c. She studies Economics at university / the university.

d. She's got a Bachelor's degree from university / the university of Oxford.

e. He took a train from the station / station.

f. When our mother was ill, we all went to hospital /the hospital to visit her.

g. He was kept in the hospital / hospital for a few days because he had a head injury.