The world ____________ is growing, so people are throwing away more rubbish.

Tourists want to explore new places, but they don’t think about environment ____________.

When you go camping, make sure you know how to ____________ a tent.

The hotel brochure says we have to ____________ before 2 p.m.

I’m afraid you can’t get on the boat with this____________. It’s too heavy.

To save electricity, you should turn off the ____________ when you leave your room.

Toxic ____________ from large factories is a huge problem in this area.

People in many places don’t have clean water to drink because of ____________.

Have you ever swum in a/n ____________? It’s more difficult than in a pool.

Old cars are worse for the environment than new cars because ____________.

There aren’t any messages from Mary. She ____________ at the hotel yet.

I think that in the future people ____________ more public transport than they do now.

Students ____________ participate in the summer camp. It’s for volunteers.

My parents want to save energy, so they _____________ some more modern electrical devices next month.

X: Have you ever been to Italy?

Y: Yes, we've ____________ visited it four times.

A _____________ is a very big animal. It lives in the sea, but it’s not a sort of fish.

When you stay at a bed and breakfast, ____________.

Last winter Tom won the school skiing ____________. He’s the best skier in the country!

My brother has toothache. He ____________