题目内容：

Excellent Smartphone Apps

Space

Space helps you set goals to be more mindful of your screen usage. When you install（安装）Space, you’ll complete a few questions about your smartphone habits and then select a user type that is the best match. The app then sets screen unlock and time-use goals. The app will send notices as screen time increases and reward you with different badges（徽章）when you meet your goals.

AntiSocial

AntiSocial is one of the best-known screen-reduction apps available on Android. While it provides many of the standard functions like screen time limits and app blocking, it has an advantages. AntiSocial compares your screen usage data（数据）to other people in your age, so you’ll an idea if you’re using your phone more than they do.

Off the Grid

For those who truly have a problem staying off that phone, Off the Grid may be for you. Off the Grid completely blocks your phone for a length of time you determine. If you want to use your phone after you’re turned on Off the Grid, it’s going to cost you. The app will charge you $1 each time you end your off-time early.

1.How does Space help its users?

A. By sending reminding messages.

B. By offering keys to their questions.

C. By setting proper life goals for them.

D. By rewarding them with more phone time.

2.What is special about Off the Grid.

A. It blocks other apps.

B. It can turn on by itself.

C. It may charge some money.

D. It limits your time on phone.

3.What do the three apps have in common?

A. They reduce screen time.

B. They have a rewarding system.

C. They are teenagers’ favorite apps.

D. They compare data from different people.