Complete these sentences using every with one of the following:
five minutes, ten minutes, four hours, six months, four years
1, The bus service is very good. There's a bus _every ten minutes_.
2. Tom is ill. He has some medicine. He has to take it ---.
3. The Olympic Games take place ---.
4. We live near a busy airport. A plane flies over our house ---.
5. It's a good idea to have a check-up with the dentist ---.