Here are the completed sentences using "like," "as," or "different":

1. This camera is not as expensive **as** I thought at first.
2. Her room is lovely. It is **like** a princess's room.
3. You like folk songs; I like pop music. Your taste is **different** from mine.
4. My dad is not always as busy **as** my mum.
5. Some of us think that Spiderman 2 is not too **different** from Spiderman 1.