10_U10.V1

______ is a column of rock that hangs from the roof of a cave and is formed over a very long period of time.

• Stalactite

• Wall

• Mountain

• Cave

Going on an eco-friendly field trip means we'll enjoy, ______ and learn about the place, but in a way that will not damage it.

• explorer

• exploration

• exploratory

• explore

Sustainable refers to the actions of the tourist industry ______ a whole.

• like

• as

• similar

• unlike

We will damage the environment if we leave ______ behind when we go travelling.

• litter

• equipment

• companion

• tool

It is our ______ to protect the environment.

• profit

• impact

• duty

• product

You can dive to explore the most beautiful coral ______ in the world when you go to Australia.

• range

• reef

• level

• base

They provide a ______ walk of 20 kilometers a day through the mountains in the north of Vietnam.

• three days

• three-days

• three day

• three-day

If you visit the national park in Zimbabwe, you can explore the park in an ______ jeep.

• on top

• open-top

• rooftop

• top

In Hawaii, you may watch animals dance and ______ out of the water to greet you.

• jump

• hop

• skip

• run

This tour is not suitable ______ families with children because everyone should move a lot.

• with

• to

• about

• for