1) because bilbo is the author of the hobbit and translator of various "works from the elvish".
2) he live in a small hobbit-hole situated at the end of bagshot row in hobbiton.
3) bilbo and frodo share a common ancestor in balbo, therefore frodo is bilbo's second cousin.
4) because bilbo celebrated his eleventy first birthday.
5) bilbo intended it to be a grand event that hobbits from all over the area would attend with some special invitations to others from farther away such as the sackville-bagginses.
6) bilbo was invited only 144 people, one gross, the sum of the ages of both bilbo and frodo, as of that day.
8) the birthday party was said to be an event of "special magnificence", featuring fireworks created by the wizard gandalf.
B: I'm worried. My exam (starts) in ten minutes.
2. A: I (am thinking) of changing school.
B: I (do not think) it's a good idea. You'll be lonely.
3) A: Why (are you) angry?
B: My sister (is always taking) my clothes.
4) A: Tom (looks) very stressed.
B: Yes. He (is studying) a lot these days.
5) A: Why (are you leaving) now?
B: My train (leaves) in an hour.