1．The UK has an amazing network of caves with some fascinating sights deep underground．If you plan to take some adventures，then one of these cave trips could be just the thing for you．
Lleehwedd Slate Caverns，Snowdonia
Head to Snowdonia in North Wales for a newly-opened Deep Mine Tour telling the story of the workers behind the industry that roofed the world．
Slate's story dates back to 500 million years，when deposits of mud and clay were made on an ancient sea bed，but it wasn't the Industrial Revotmitm until demand exploded．
Tickets from£20，family discount of£5 per person if you buy at least three tickets and one ticket must include a child．
http://www．llechwedd-slate．caverns．co．uk
Chislehurst Caves，London
These 2mile long chalk caves were mined by hand for over 8，000 years and were in use up to the 1830s．It was used as a shelter during the First World War and in the Second．
Explore the dark and mysterious passage ways'exciting history on a guided tour which promises a journey through time fight up to the present day．
Tickets£4 for kids，£6 for adults．
http://www．Chislehurst-caves．co．uk．
Blue John Cavern，Derbyshire
Head to this cave in the Peak District to explore the home of semi-precious Blue John mineral．Romans first discovered it 2，000 years ago and it is still mined at Blue John Cavern，mostly by hand，before being turned into jewellery on sale in local shops．
You can also keep an eye out for the fossils of sea creatures-this area was once underwater．
Tickets from£6 for kids，£9 for adults，£32 for a family．
http://www．bluejohn-cavern．co．uk．
Cheddar Gorge and caves，Somerset
The 300ft deep prehistoric cavern is part of Cheddar．You can see the skeleton of Cheddar Man，the earliest known human remains in Britain which date back to 7，150 years，at Gough's Cave．
Then head to Cox's Cave for the Dreamhunters multimedia experience telling the story of early man．
Tickets from£11.85 for kids．£16.95 adult．
http://www．cheddargorge．co．uk．
21．How much should a family with 2grown-ups and 1child pay for Llechwedd Slate Caverns？B
A．£20．
B．£45．
C．£50．
D．£60．
22．Which of the following caves served as a shelter when wars broke out？C
A．Llechwedd Slate Caverns．
B．Blue John Cavern．
C．Chislehurst Caves．
D．Gough's Cave．
23．What can visitors see when visiting Blue John Cavern？D
A．Ancient sea beds．
B．Skeletons of Cheddar Man．
C．Endangered sea creatures．
D．Fossils of sea creatures．
24．Where can you learn more about the earliest known human remains in Britain？A
A．http://www．cheddargorge．co．uk．
B．http://www．bluejohn-cavern．co．uk．
C．http://www．chislehurst-caves．co．uk．
D．http://www．llechwedd-slate-cavems．co．uk．
