1) guide book
2) be typical
3) go sightseeing
4) art gallery
5) visit museums
6) look round
7) go on a (guided) tour
8) get lost
9) take photos

a) go as a tourist to look at interesting buildings and placec
b) in the situation when you dont know where you are
c) walk round a place to see it
d) take pictures with a camera
e) a short visit to a town, museum, etc. sometimes with a guide
f) a book which describes a place for tourists
g) go and see a place where you look at old or interesting things
h) a place where people can look at paintings
i) be a good example of its kind

waste     to waste

protection     to protect

destraction     to destroy

pollution     to pollute

damage     to damage

damage     damaging

environment     environmental

harm     harmfull

danger     dangerous

safety     safe

1) they're 

2) doesn't

3) can't

4) it'll

5) it won't

mary used to eat junk food when she was a child but now she keeps fit and prefers healthy food.

10 years ago people used to pay only in cash, but today most people have credit cards.

seven years ago i used to have a motorbike, but now it belongs to my sister as i drive a car.

when he lived in paris, he used to eat frogs every weekend, but now he lives in india and he eats indian food every second day.

when her granddaughter was a kid she used to believe that snow was made of ice cream.

every week)) потому что время present simple : )