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Over the past few years，East Asia has seen a huge rise in the rate of short-sightedness （近視率）.Long school days are leaving children with little time to enjoy sunshine.Too little light may cause short-sightedness.    East Asia began its economic （經(jīng)濟(jì)的） rise in the 1960s.After that，short-sightedness became common in the area.These days，however，almost every young East Asian is short-sighted.In Singapore，nine in ten school-leavers are short-sighted.In China，the rate of short-sightedness among its middle school students has risen to nearly 80 percent.    At the same time，the West isn't staying out of trouble either.One study in California，for example，found a rate of 59 percent among the state's 17 to 19-year-olds.    However，there may be worse things to meet with.Short-sightedness is a lifelong problem，because people with poor eyesight are more likely to have eye problems later in life and some of them can even slowly go blind.This will probably have a bad influence on the future of a country.    Giving students more time outside can cut down the number of children who will become short-sighted.Some wise governments have decided to make sure that their kids are spending more time outdoors.

（1）What may cause short sightedness according to Paragraph 1？

Too little light （may cause short-sightedness）./Long school days.

Too little light （may cause short-sightedness）./Long school days.

（2）When did short-sightedness become common in East Asia？

After the 1960s （short-sightedness became common in East Asia）.

After the 1960s （short-sightedness became common in East Asia）.

（3）Which country has the lower rate of short-sightedness among teenagers，Singapore or China？

China （has the lower rate of short-sightedness among teenagers）.

China （has the lower rate of short-sightedness among teenagers）.

（4）Why is short-sightedness a lifelong problem？

Because people with poor eyesight are more likely to have eye problems later in life and some of them can even slowly go blind.

Because people with poor eyesight are more likely to have eye problems later in life and some of them can even slowly go blind.

（5）How can governments cut down the number of children who will become short-sighted？

By giving students more time outside.

By giving students more time outside.