Unit 8: Time to Spare (Reading)

Stephen Alvarez is a caver. He travels the world exploring and photographic caves. He ___ to climb mountains to reach some caves or dive deep down to search for underwater caves.

• used

• has

• is

• was

He has photographed some very impressive caves including the longest in the world, Mammoth Cave in the USA, ____ has 850 kilometres of tunnels.

• which

• where

• who

• when

People sometimes ask Alvarez _____ caving is dangerous. It is.

• as

• if

• even

• though

Cavers carry the right _____ for all situations. Knee pads and gloves are important, and they must wear ______ to protect the head.

• dress, cap

• costume, scarf

• equipment, helmet

• outfit, hoodie

There are many fantastic shapes to see in caves. Besides stalactites and stalagmites, there are many ____ including some that look like popcorn and some that look like nest of eggs.

• amounts

• other

• also

• others

Animals live in caves, too. Many of _____ are eyeless. They don't need eyes because there is no light in the cave.

• these

• this

• their

• that

Explorers like Alvarez know how important it is to ______ caves. Pollution is one threat.

• save

• protect

• rescue

• defend

Human visitors can also be a threat. A _____ caver can destroy in minutes what took thousands of years to form.

• casual

• messy

• fast

• careless

That's _____ responsible cavers say, "take nothing but picture. Leave nothing but footprints. Kill nothing but time!".

• how

• because

• why

• so