One of the words in each sentence is in the wrong form

One of the words in each sentence is in the wrong form. Write the correct word. 1 This path looks a bit danger to me. 2 This submarine only goes to a deep of 500 metres. 3 Scientists worry about the destroying of the Amazonian rainforests. 4 Garden must be a very interesting hobby. 5 Air pollute is a serious problem, especially in cities. 6 What's it like living in centre London? 7 We should let animals live in their nature environment rather than keep them in zoos. 8 It's so fog that I can't see where I'm going. 9 What would you do if there was an invade of the Earth by aliens? 10 The island is almost completely circle.