66.9.1 Rewrite the sentences in the
present simple passive.
Millions of tourists visit Astana every year.
They use the Saryarka Velodrome mainly for
track cycling events.
3
They hold the President's Cup tennis
tournament at the Daulet National Tennis
Centre every year.
4 The Astana Arena stadium holds 30,000
spectators.​

I think that we have many environmental problems for example air pollution, water pollution and more others. Air pollution is a very serious problem because it causes global warming and as a result climate change. The reason for global is polluting the atmosphere with green house gases. This can be a big problem for many plants, animals and people.
Pollution is a very serious and we need to control and prevent it. We can reduce the amount of industrial wast and sewage. We can recycle all toxic materials. But the main thing is try to use the nature with care.

1.I am in the sixth form. - I am not in the sixth form
2.We are reading an interesting story.- We are not reading an interesting story
3.They study English for ten years.- They don’t study English for ten years
4.My sister plays the piano very well.- My sister does not play the piano very well
5.He was at the cinema yesterday.- He was not at the cinema yesterday
6.The children were playing in the yard.- The children were not playing in the yard.
7.I finished my work last Tuesday - I didn’t finish my work last Tuesday.-
8.We kept some domestic animals two years ago.- We did not keep some domestic animals two years ago.
9.They will write a test tomorrow.- They will not write a test tomorrow
10.He will go to the seaside next summer.- He will not go to the seaside next summer
11.I have already cleaned my room.- I have not already cleaned my room
12.She has done all the exercises.- She has not done all the exercises.