题目内容：

    The Walkmeter Walking & Hiking GPS has characteristics that are excellent for fitness walkers who want to improve their speed and distance. It uses your phone's GPS to measure the distance of your walks and hikes. It includes audio and voice integration（集成）so you can not only be informed of your workout statistics, but you can also listen to replies your friends send about your workout posts from Facebook and Twitter while you walk. Upgrading is less than $10 per year, far less than with some other apps, such as Endomondo.

Argus packs a lot into one lifestyle app. It functions as an all-day pedometer app. Your daily step count updates from your phone and includes active time, distance, calories, steps. and an hourly graph, It can also measure your heart rate at any time. You can easily take your heart rate during exercise and at rest. Besides, you can use the app’s food diary and sleep timer. A wide range of fitness and diet plans are also provided on it.

Charity Miles gives your walking a purpose, because it turns your exercise into donations to a certain cause. Open up this free app（iOS or Google Play）and choose a charity. Start a workout, choosing walking, running, or cycling. For each completed mile, you’ll have earned a donation for your chosen charity. The basic rate is 25 cents for walking and running miles and 10 cents for cycling miles, subject to a periodic cap. When you finish your walking, you must post to Facebook or Twitter to earn money for your charity.

1.What can users do with the Walkmeter Walking & Hiking GPS while exercising?

A.Upgrade the app for $10. B.Check comments of friends.

C.Reply to friends’ posts online. D.Make personalized fitness plans.

2.What is special about Charity Miles?

A.It is free of charge. B.It can earn you money.

C.It offers a new way of donating. D.It is connected to social software,

3.Where is the text probably taken from?

A.A website on app ratings. B.An online fitness course.

C.A medical report. D.An advertisement for phones.