Write the missing word.вставь слово)

some of these can have more than one answer!
1. dave is (more, less) intelligent than mike
2. (Did, when did) they use to live by the sea?
3. he pretended to be a ghost
4. alexia isn't as good at English as her sister
5. you're shorter than my brother
6. wow! you're the best!
7. let's ask Tom to help us