Defining relative clauses

I'll lend you a book__________I bought last week.

This is the boy _______________ won the competition last year.

1938 is the year_______Superman first appeared in a comic book.

These are the shoes _______________ cost me 450 zlotys

There's a girl in my class_________sister is the best basketball player at school.

Monday was the day _______________ everything went wrong.

I've got a friend in London____________brother was an extra in a few films last year.

Ben Affleck is the actor__________plays the main character in this film

London is a city_________you can see Big Ben.

The main character arrives in a small town__________he finds a job.

This is a small laptop _______________ can be used anywhere.

Wednesday was the day _______________ my class had a test.