1. Pets are important today because _____. 
　　　A) people can make money from them
　　　B) 61 percent of American families own them
　　　C) they are helpful to people’s health
　　　D) people can live with them

　　2. Which of the following statements is NOT True? 
　　　A) Pets have an effect on humans’ heart rate and blood pressure.
　　　B) Scientists have studied the relationship between humans and pets.
　　　C) Pets are much reliable when contacting human beings.
　　　D) Pets are important only to people in wheelchairs.

　　3. What is the topic of the passage? 
　　　A) Importance of pets.
　　　B) Heart rate and blood pressure.
　　　C) Pets in the U.S.A.
　　　D) Social contact.