题目内容：

    Are you nearsighted(近视）? Do you wear glasses? Many of you may say "yes". In fact, according to a report from the World Health Organization, China has the biggest population of nearsighted young people. More than 70％of middle school students in China are nearsighted.

In August, a plan to solve this problem was introduced. It aims to cut down the rate（率）of nearsightedness for middle school students to less than 60% by 2030. Schools across the country are taking action to meet this goal.

Luoyang Experimental School in Henan started with its desks. It has made desks with a board above the desktop. The board stops students from lowering their heads too close to their desktops. More than 400 students have used them so far. More students will use them soon. Similarly, the High School Affiliated to Remain University Chaoyang Branch School is now providing desks and chairs according to students' heights. Studies have shown that proper desk height can stop nearsightedness.

Spending more time outside can also reduce nearsightedness. Chengdu No. 7 High School makes sure that its students play outside for at least 80 minutes every day. "We have a PE class and a 20-minute break in the morning and afternoon to do exercises.”said Sun Zihan,l4.

Staring(凝视）at screens can also hurt our eyes. Beijing 101 Middle School has a solution to this problem. In its classrooms, there are special boxes for storing students' cell phones. "We have to hand in our cell phones every morning and get them back after school," said Huang Jiameng,15.

1.In China,___________ of middle school students are nearsighted.

A.more than 70 percent B.less than 70 percent

C.more than 60 percent D.less than 60 percent

2.___________ can not cause students' nearsightedness according to the passage.

A.Using uncomfortable desks and chairs B.Doing more exercises outside every day

C.Staring at cell phones for too long a day D.Spending lots of time doing homework

3.The underlined word "reduce" here probably means ________________.

A.cut up B.cut down C.turn up D.turn down

4.What can we infer from the passage?

A.Parents have tried different ways to save students' sights.

B.Less attention has been paid to nearsightedness.

C.Cell phones will disappear in schools

D.The rate of students' nearsightedness will fall in the near future.