Here are the correct answers to complete the passage:

1. **b. differently**
2. **a. Overall**
3. **a. to compare**
4. **d. those**
5. **a. on**
6. **b. in**
7. **a. hanging**
8. **b. more likely**

So the completed passage would read:

Teens today in the U.S. are spending their time **differently** than they did a decade ago. They’re devoting more time to sleep and homework, and less time to paid work and socializing.

**Overall,** teens spend an hour a day, on average, doing homework during the school year, up from 44 minutes a day about a decade ago and 30 minutes in the mid-1990s.

Teens are also getting more sleep than they did in the past. They are clocking an average of over nine and a half hours of sleep a night, an increase of 22 minutes **to compare** with teens a decade ago and almost an hour more than **those** in the mid-1990s.

Teens now enjoy more than five and a half hours of leisure a day. The biggest chunk of teens’ daily leisure time is spent **on** screens, which can include time spent gaming, surfing the web, watching videos and watching TV. However, the time spent **in**—including attending parties, extracurriculars, sporting or other entertainment events—**hanging** with others in person or on the phone has declined.

Teens also are spending less time on paid work during the school year than their predecessors. Much of this decline reflects the fact that teens are **more likely** to work today than in the past.