( ) 21. We should brush our teeth at least _________.

A. twice a day B. three times a day

C. once a day D. four times a day

( ) 22. Doctors suggest that people should wash their hands ___.

A. twice a day B. three times a day

C. four times a day D. eight times a day

( ) 23. Which of the following is true according to the text?

A. We should keep from touching our faces

B. There are less than 300 types of bacteria in the mouth

C. A kitchen sponge can carry more germs than a toilet

D. We should wash our hands before touching a door handle

( ) 24. The text probably comes from ____.

A. a guide book B. a popular magazine

C. a book review D. an official document

B

Many people love keeping the pets (dogs, cats, horses, etc) and have them as their good friends. In Canada, people usually take their pets to animal hospitals to give them injections so that they won't carry diseases before they keep them in their houses. They have special animal food stores, though they can get animal food in almost every kind of stores. Some people spend around two hundred Canadian dollars a month on animal food.

When you visit people's houses, they would be very glad to show you their pets they are very proud of them. You will also find that almost every family has a bird feeder in their garden. All kinds of birds are welcomed to come and have a good meal. They are free to come and go and nobody is allowed to kill any animal in Canada. They have a law against killing wild animals. If you killed an animal, you would be punished. If an animal happened to get run over by a car, people would be very sad about it.

People in Canada have many reasons to like animals. One of them might