Here are the completed sentences:
- I'm going to the post office to buy a stamp.
- Is the bank open today? I need to get some cash.
- My tooth hurts. I think I should make an appointment with my dentist.
- I'm going to the library to borrow a book about insects.
- I've got my flight, but I still need to book a room in a hotel for my holiday.
- Is there a chemist near here? I need to buy some medicine.
- I booked a tour of the city at the tourist information centre.
- Let's go to that new café. They make great hot chocolate.