21. What is the writer trying to do in this text?

A. advise people to take adventure holidays
B. explain a rather unusual choice of transport
C. suggest the benefits of a special vehicle
D. persuade people to travel long distances

22. What made Cliff realise he wanted to cycle round Britain?

A. touring Europe in an old car
B. visiting a unicycle factory
C. attending motor races abroad
D. taking his bike to another country

23. When Cliff met other cyclists in the mountains, he was ______ 

A. anxious to get away from them.
B. satisfied with his own type of bicycle.
C. jealous of what they were able to do.
D. surprised by their attitude towards him.

24. What was Cliff’s biggest problem during the trip? 

A. He fell ill for nearly a week
B. He had to go home to rest.
C. He wanted to finish his trip early.
D. He took too long to get to one place.