If you need to call your parents but your phone is not with you, can you remember their numbers?
To remember 11 numbers is not difficult. However, because of the smartphone, many of us are losing this ability, Record Japan reported.
What’s more, smartphones weaken our skills at giving directions as well as  it’s common for most of them to check their phones.
According to a report by Kleiner Perkins Caufield Byers, an American company, Chinese people spend on average 170 minutes on their smartphones daily.
For students, an addiction(沉溺) to smartphones does no good for studying. Research  by Japan’s Education Ministry shows that children who spend more than four hours a day on their phones perform much worse in school tests than those who play with their phones for 30 minutes a day.
It’s true that the smartphone has made our lives easier. But many also think they spend too much time on it, and this is bad for their study or work. People are trying to change that.
A new app called Forest was introduced this month. It lets users plant a seed(种子) that grows into a tree over the next 30 minutes . During the half hour, users cannot use their phones, or the tree will die.
A restaurant in Los Angeles, US, gives people a 5 percent discount(折扣) if they don’t check their phones during a meal. Owner Mark Gold said that he hoped it could give people a way to enjoy their meal and actually talk with friends and family in person.

The ______ of smartphones

When we meet together, we will spend most of the time ______ . Chinese people spend on average ______ on their smartphones everyday. The students who ______ on their phones perform much worse in school tests. The app Forest aims to help people spend ______ time on their phones.