many, much, any
How _____ of your rubbish do you recycle?
much
Prague is a beautiful city with lots of (old) buildings.
Prague is a beautiful city with lots of historic buildings.
John (know) his boss for about four months.
John has known his boss for about four months.
If the weather is good, we (explore) the forest on Saturday.
will explore
He's the man. He invented a new kind of bike.
He's the man who invented a new kind of bike.
How _____ newspapers and magazines do you buy a week?
many
In the USA, you can buy (big) burgers.
In the USA, you can buy massive burgers.
My sister (work) for many different tech companies.
My sister has worked for many different tech companies.
If they find a cure for cancer, many people (live) much longer.
will live
There is the woman. She works in my father's lab.
There's the woman who works in my father's lab.
Do you reuse _____ of your household items for something else?
any
This cake is (good). Can I have another piece, please?
This cake is delicious. Can I have another piece, please?
She (not eat) Vietnamese food before.
She hasn't / has not eaten Vietnamese food before.
When he comes home from a trip, he (be) usually very tired.
is
These are the machines. They use less energy.
These are the machines that / which use less energy.
There aren't _____ recycling centers in my town.
any
The book was very (boring) and I didn't want to finish it.
The book was very dull and I didn't want to finish it.
They (not be) in the office since 8 am this morning.
They haven't been in the office since 8 am this morning.
Those fish (die) if you don't clean the tank!
will die
This is the documentary. I was watching it last week.
This is the documentary that / which I was watching last week.
Not _____ people on my street recycle.
many
When I first left home I was (sad) because I didn't know anyone and I missed my family.
When I first left home I was miserable because I didn't know anyone and I missed my family.
Paul and Ann have bought a new car.
People (become) dehydrated when they don't drink enough water.
become
That's the factory. They developed new batteries at the factory.
That's the factory where they developed new batteries.