Fill in the gaps (1-8) with there,is, there, are, or it is.
1 ___ difficult to predict the weather especially in Britain. 2 ___ too many things to take into consideration. Even if 3 ___ warm and sunny in the morning, 4 ___ no guarantee the weather will be the same at noon. However, when 5 ___ heaven clouds in the sky or when 6 ___ snowing, 7 ___ no change or radical improvement. A light shower is always possible, thought, even on a sunny day, so 8 ___ always wise to carry your umbrella.