what does Earth provide people?why do people and nature suffer?What vital resources are being wasted?what may become the problem in 20th century?What movement appeared in order to protect the environment?do foreigners help to save the Baikal?What international organization Greenpeace help to save in Russia?what happens to animals and plants when we ignore environmental problems?Should the natural resources be used rationally?is it true that more and more people raise their voices in defense of nature?
when the fire started dad was taking a shower
when my dad came home mum was still cooking the dinner
he was driving home when he saw a car accident
bobby broke his leg when he was playing football
I was exercising for 49 minutes on Saturdays
it was snowing yesterday for the whole day
Cathy was swimming when suddenly the light went off and she got scared
at 4 o'clock on Tuesday morning my sister was playing with our cat
we were playing a computer game when mom came home
My dad was reading a paper while we were going to the bus station