- How long...you ...as a teacher?. - When ...you ...to Greece. - He must be hurry because he ...to the doctor’s.. - I read an interesting article ...the paper this morning.. - We arrived ...the airport in New York at 6 a.m.. - Turn ...the music. - I managed ...my passport.. - He agreed ...the job as soon as possible.. - I stopped ...my book and went to bed.. - Air ...is a global problem.. - Mount Everest ...to be the highest mountain in the world.. - won’t be. - Visitors are not ...to touch the exhibits.. - Do I have to ...my age?. - How can we keep our teeth healthy? First, we ought to visit our dentist twice a year. - He can fill the small holes in our teeth before they destroy the teeth. - He can examine our teeth to check that they are growing in the right way. - Secondly, we should brush our teeth with a toothbrush and fluoride toothpaste at least twice a day, once after breakfast and once before we go to bed. - We can also use wooden toothpicks to clean between our teeth after a meal.. - Thirdly, we should eat food that is good for our teeth and our body: milk, cheese, fish, brown bread, potatoes, red rice, vegetables and fresh fruit. - They are harmful because they stick to our teeth and cause decay.. - when we keep our teeth healthy b. - How often ought we to clean our teeth?. - Why aren’t sweets good for our teeth?
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