Choose the correct words. Which sentence is false?
1  There is a / some desert in central Asia.
2  There are four season / seasons in polar regions.
3  There is a / some rain every day in rainforests.
4  There are some / any colourful plants in rainforests.
5  There aren't a / any cactuses in polar regions.
6  There isn't any / some ice in deserts.
7  Are there any / some poisonous animals in rainforests? Yes, there are.
8  Is there any / a sun in winter in polar regions? No, there isn't.