Listen to part of a talk about why people yawn. – Luyện nghe VSTEP Part 3 – Bài nói, bài giảng

1. What did the study in the 1980s show?

A. Tired people yawn more than others.B. People yawn more in cold rooms.C. Yawning increases the oxygen in our blood.D. Breathing extra oxygen did not make people yawn less.

2. According to one theory, what does yawning help to do?

A. cool the brainB. keep us awakeC. show other people we are tiredD. take in more oxygen

3. According to some studies, when do people yawn less often?

A. when they are tiredB. when the air is very hotC. when they are with friendsD. when the air is slightly cool

4. At what age do most children start to catch yawns from other people?

A. at about tenB. before they are bornC. at about four or fiveD. at about one year old

5. Who are people most likely to catch a yawn from?

A. strangersB. their teachersC. their petsD. family members and close friends