B4

In the past people enjoyed watching TV or reading in their free time.
(past simple, т.к. это было в прошлом)

ENJOY

B5

Nowadays people are more interested in doing activities which take them out of their homes.
(ing форма идёт после предлогов)

DO

B6

That's why mountain biking has become a very popular sport in recent years. It is one of the most rewarding ways to explore the countryside.
(present perfect, т.к. процесс не закончился. Это стало более популярным и продолжает становиться)

BECOME

B7

Cyclists must pay attention to the type of path they are on. Some paths are designed for people who are on foot.
(present simple passive, т.к. их сконструировали, а не они сами что-то сконструировали)

DESIGN

B8

So if you cycle along these paths, you will cause inconvenience to walkers. On any other path, you should still re­spect walkers.
(1й conditional)

CAUSE

B9

Another thing which everyone is asked to do is closing gates behind you, so that farm animals cannot escape.
(present simple passive, т.к. каждого просят делать, а не каждый просит делать)

ASK

B10

If the weather is fine, you will enjoy a wonderful day out, especially if you don’t forget to take some food and drinks with you.
(1й conditional)

NOT FORGET