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Read the following passage about four apps.

Start Walking Path

This app was created by the American Heart Association to encourage people to walk more to stay fit.It makes it easy for you to find or create and then share nice walks wherever you are.For example, imagine you take a walk through a park on your way home from work one day.You can map your walk using this app and share it with your friends and co­workers so they can enjoy it too.Or you can search a new area to see if anyone else has posted a nice walk.

Weigh What Matters

This app was created by the American Medical Association to make it easy for patients to set healthy goals and then keep track of their progress.The app tracks three areas: weight, nutrition, and physical activity.Users record what they weight, what they eat, and how much exercise they get.From this information, a progress report is created and emailed to the patient's doctor.If patients are not getting enough exercise, their doctors can encourage them to work out more often.

My Fitness Pal

This app allows you to easily keep track of everything you eat and shows you the calories you are consuming.You can also keep track of or find recipes for healthy meals.And it has links to discussion boards where you can get support from other people who are trying to lose weight.

Sleep Cycle

This app watches you while you sleep.It then teaches you about your sleep patterns.You can then use the information to change your pattern if necessary in order that you can sleep better.Here's how it works.You places your phone on your bed, near your pillow.Then just go to sleep — your phone keeps track of your movement and breathing during the night.It records this information in an easy­to­read graph that shows you how much you move and how often and when you wake up during the night.It also choose the best time to wake you up so that you have a peaceful start to your day.

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1£®What do the four apps have in common?

A£®They are all apps to enable users to socialize.

B£®They are all apps to help users become healthier.

C£®They are all apps to ensure users have a good sleep.

D£®They are all apps to encourage users to take exercise.

½âÎö£ºÑ¡B¡¡Ï¸½ÚÀí½âÌâ¡£ÓÉStart Walking PathÖеēstay fit”£¬ Weigh What MattersÖеēset healthy goals”£¬ My Fitness PalÖеēhealthy meals”£¬»¹ÓÐSleep Cycle Öеēsleep better”£¬¿ÉÖªÕâËĸöÈí¼þÓÐÀûÓÚÈ˵ÄÉíÌ彡¿µ£¬¹ÊÑ¡B¡£

2£®Which pair of apps allow users to record what they eat?

A£®Start Walking Path and Weigh What Matters.

B£®Weigh What Matters and My Fitness Pal.

C£®Sleep Cycle and Start Walking Path.

D£®My Fitness Pal and Sleep Cycle.

½âÎö£ºÑ¡B¡¡Ï¸½ÚÀí½âÌâ¡£¸ù¾ÝWeigh What MattersÖеēUsers record what they weight, what they eat”ºÍMy Fitness PalÖеēThis app allows you to easily keep track of everything you eat”¿ÉÖª£¬Weigh What Matters ºÍ My Fitness Pal¿ÉÒԼǼÓû§³ÔÁËʲô¡£¹ÊÑ¡B¡£

3£®Which of the following is a function of Sleep Cycle?

A£®It can serve as an alarm clock.

B£®It is connected to the user's doctor.

C£®It keeps track of the user's brain activity.

D£®It wakes the user up if he doesn't sleep well.

½âÎö£ºÑ¡A¡¡Ï¸½ÚÀí½âÌâ¡£¸ù¾ÝSleep CycleÖеÄ×îºóÒ»¾ä“It also choose the best time to wake you up so that you have a peaceful start to your day.”¿ÉÖª£¬Ëü¿ÉÒԳ䵱ÄÖÖÓ½ÐÓû§Æð´²£¬¹ÊÑ¡A¡£