Newborn babies do not usually have any teeth．Their front teeth begin to grow when they are about six months old．Most children have all their“milk”teeth by the time they are two years old．There are 20 teeth altogether．
The front teeth are used to cut food by biting．The back“double”teeth are used to grind up the food．This makes the food easier to swallow．
Foods that are sticky and have a lot of sugar in them will make holes in the teeth if the teeth are not cleaned with a brush．
The“milk”teeth start to fall out when children are six or seven years old．The new teeth that grow in their place have to last for ever！
Tick（√）the right answers．
1．When does a baby usually get its first tooth？
□ When it is six years old
□ When it is six months old
2．How many teeth could a baby have when it is two years old？
□ 5 teeth
□ 10 teeth
□ 20 teeth
Complete the sentences．
3．The ______ teeth are used to bite an apple．
● back ● front
4．We need our teeth to ______ our food．
● chew ● such
5．The double teeth make our food ______ to swallow．
● harder ● easier
6．The ______ teeth grow first．
● front ● back
7．Milk teeth are the ______ set of teeth we have．
● second ● first
8．If you don't brush your teeth after eating sweets，your teeth_____________．
● will fall out ● will not grow ● will get holes in them
Key:
1．When it is six months old．2．20teeth 3．front 4．chew 5．easier 6．front 7．first 8．will get holes in them
