2 Complete the sentences with the words in the box. There are two extra words. 0 Geography trips aren't boring. They're exciting. 1 Be careful. That dog isn't _________. 2 I can't do my homework. It's _________. 3 He is a _________ runner. 4 I can't buy this watch because it's very _________. 5 My bike isn't dangerous. It's _________.