The word“day” has two meanings. When we talk about the number of days in a year,  we are using “day” to mean 24 hours. But when we talk about day and night,  we are using“day” to mean the time between sunrise and sunset. Since the earth looks like a ball,  the sun can shine on only half of it at a time. Always one half of the earth is having day and the other half night. A place is moved from day into night and from night into day over and over by the spinning（旋转）of the earth. At the equator（赤道）day and night are sometimes the same length（长度）. They are each twelve hours long. The sun rises at 6 o'clock in the morning and sets at 6 o'clock in the evening. For six months the North Pole is tilted（倾斜）toward the sun. In those months the Northern Hemisphere（半球）gets more hours of sunlight than the Southern Hemisphere. Days are longer than nights. South of the equator nights are longer than days. For the other six months the North Pole is tilted away from the sun. Then the Southern Hemisphere gets more sunlight. Days are longer than nights. North of the equator nights are longer than days. Winter is the season of long nights. Summer is the season of long days.

    Lydia is 14 years old. She lives in a small house with her parents and two brothers, Daniel and Henry. Daniel is 12 years old, and Henry is 9 years old. Daniel and Henry often complain about the small house. They want to live in a big house. Their dream house is very big. In the house, they each have a bedroom, a desk and a computer. In front of the house, there is a big beautiful garden. In the garden, there are some fruit trees. They like eating fruit very much. Behind the garden, there is a swimming pool. They like swimming, too. They can ask their friends to come to their house on weekends. They can play computer games, swim and do their homework together. They say they will have a lot of fun that time.

Here are four clothing stores.

Notes: £ means the cheapest; £ £ £ £ means the most expensive;

★ means friendly; ★★★★ means the friendliest

    It is increasingly popular for Chinese youngpeople to share their experiences on social media (媒体), such as the"moments"(朋友圈)on popular instant messagingservice WeChat. "I have been reading 'JaneEyre' for 40 days with 48,000 words finished Li Anqi said. Li has beensharing her reading experience on WeChat moments every day since January.Working in Yinchuan, capital of Northwest China? s Ningxia, Li wants to learnEnglish very much, but cannot get rid of (摆脱)theeveryday work of school lessons.

    "I found many of my WeChat friends hadbeen reading books or learning English on mobile reading apps, and I did notwant to fall behind," Li said.

In January, she spent more than 100yuan buying an online reading class at the Bohe Reading app, which tellscustomers they can: "Finish reading your first English book here."

    At her reading class, teachers assignreading homework and give instructions to 430 class members every day.

    A survey reportreleased on Thursdaysaid 70.9 percent of primary and middle students in China use the Wechatinstant messaging App.

    At the same time, 75. 9 percent of Chinesechildren have their own mobile phones, according to China National Children'sCenter.

    The figures were based on a survey of nearly9000 children across China.

    However, 28. 8 percent of them never readnews online and 43. 2 percent have never touched newspapers.

    The center called for efforts to address thedigital divide between urban and rural education and protect children's privacy(隐私)asInternet users.