Choose the correct options

We can omit (not use) relative pronouns who(m), which, that if there is a subject + verb after them.

We can't omit relative adverbs where, when, why.

This is the bookwhichmy father likes very much. = This is the book my father (subject) likes (verb) very much.

But:This is the bookwhichis very expensive. — Which can't be omitted.

This is the housewhereI live. — Where can't be omitted.

We can omit relative pronoun in:

• The school that I graduated from was closed.
• This is why I like him.
• That's the cat that has nowhere to live.
• I don't like the hat that you're wearing.
• The bike that my parents bought me has broken down.
• Who is that girl that is standing near your brother?
• I can see a man who is not wearing a mask.
• The girl whom I like is not in my class.
• Let's play a game which is the easiest to play.
• What's the name of the city that you visited last month?
• The flat where I live isn't very big.
• Throw away that sofa which is very old.