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第二部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
It's both an exciting but frightening experience for parents the moment their teenager obtains a driver's license.Here are some of the best and most recommended apps for teen drivers and for their parents'peace of mind.
Safe Driver This app works by monitoring the position and the driving speed of your child.You can also set a speed limit.
Whenever your child drives over this speed limit，an alert（警报）will be sent to your phone.Its only drawback is that it's only effective when your child opens the app on their phone while driving.
DriveSafe.ly If you're scared of your teenagers'tendencies to be on the phone while driving，this is a great app for them to use.Whenever a text message comes in，it'll read the text message out loud.The.driver needn't take their hands off the wheel in order to check text messages on their phone.The user can eyen respond to the message via voice.There is no need for them to type the reply.
Textecution This app locks a driver's phone while he or she is driving，preventing the user from gaining access to any of the SMS functions of the phone.Parents can be alerted via the app's website.For example，you'll be sent an alert in the event that the driver has requested permission to access their phone's messaging function.This function can only be activated if the driver is safely parked or in the event of an accident.If ever your child removes the application from their phone，parents can be informed，too.
The initial purpose of this app is connecting family members together.Through the app，you can share your position with one another wherever you are.It provides real-timedata for parents about position and driving speed.
Parents can，therefore，feel safe and secure knowing that uhgif child has reached their intended destination.The application can be turned off.But it'll inform the melbers within the app that your child has disabled it.
21.What can the app Safe Driver do？
A.Control the user's driving speed.。
B.Keep working even when it's turned off.
C.Help teenagers develop good driving habits.
D.Alert parents to their children's overspeed driving.
22.Which app enables the user to receive and answer text messages easily while driving？
A.Safe Driver.B.DriveSafe.ly.
C.Textecution.D.Life360.
23.What do Textecution and Life 360 have in common？
A.They are intended to bring family members closer.
B.Teenagers can't delete them without parents'permission.
C.Parents can know if they stop working on teenagers'phones.
D.They offer parents real-time data about position and driving speed.
B