Complete the sentences with thing, where or one.

1 There's someone at the door - who do you think it is? 2 I've looked everywhere and I can't find the book. 3 I want to get something special for your birthday. 4 She went to the party, but she didn't know anyone there. 5 If everything helps, it'll be much quicker and easier. 6 I can't find my keys anywhere. Have you seen them? 7 No one spoke to me all day. It was very quiet. 8 I'm sure your bag is somewhere in the house. Have you looked in your room?