Jim is running          Bruce. They are neck and neck..

A. faster than      B. more slowly than     C. as faster as     D. as fast as

before, discover , fast, in, come, watch , so, fast it, ago , shine, not can

Light travels at a speed(速度) which is about a million times 1 . ________ than that of sound.  2. ________ one second, light travels about 300,000 kilometers, but sound travels only 340 meters. You can get some idea of this difference by  3. ________  the start of a running match. If you stand far away from the starter(发令员), you can see smoke 4.________ from his gun 5.________ the sound reaches your ears.

The fast speed of light produces some strange facts. The nearest star is 6. ________ far away that light which you can see from it tonight started to travel to you  four years  7. ________ at a speed of nearly two million kilometers every minute. The light from some of tonight’s started on 8. ________ journey towards you even before you were born.

So, if we want to be honest(诚实), we 9.  ________ say , “ The stars are shining brightly tonight.”  We have to say, “ The stars look nice. They were 10. ________ four years ago but their light has just reached our earth. ”

Basketball stars are usually tall．The stars of other sports are sometimes short．Some of the best football players are not very tall．

Short people often have better balance(平衡)than tall people．So they do not fall over very often．In some sports the players must have good balance．For example，table tennis and running．

You do not need long legs to run fast! Some of the fastest runners in the world are not very tall. Some people are tall and some people are short. There is no medicine to make people grow taller or shorter．

The tallest woman in the world is Sandy Allen．She is 2.41 metres tall and lives in the United States. The shortest person in the world is Gul Mohammed from India．He is only 57 centimetres(厘米)tall.

Today young people in many countries grow taller than their parents．This is because they eat better food today．Good food can help children grow．

53．Basketball players are ____________.             

A．usually tall     B．all tall        C．very short     D．usually short

54．The tallest woman in the world is in ___________.

A．America        B．India         C．China       D．Japan

55．What can make boys and girls grow taller according to the passage?

A．Playing basketball．                 B．Taking some medicine

C．Playing football．                   D．Eating good food．

56．Which of the following is true ?

A．The fastest runners are all tall.          B．The shortest person in the world is in India.

C．Young people are not as tall as their parents.    D．Tall people have better balance.

 come   watch  shine   fast   its     

    Light travels at a speed(速度) which is about a million times(76)_______     than that of sound in one second, about 300,000 kilometers while sound travels only 340 meters. You can get some idea of this difference by(77)_____       the start of a running match. If you stand far away from the starter(发令员) , you can see smoke(78)_______      from his gun before the sound reaches your ears.

The fast speed of light produces some strange facts. The nearest star is so far away that light which you can see from it tonight started to travel to you four years ago at a speed of nearly two million kilometers every minute. The light from some of tonight’s started on (79)_________journey towards you even before you were born.

So, if we want to be honest, we can’t say, “The stars are shining brightly tonight.” We have to say, “The stars look nice. They were(80)______        four years ago but their light has just reached our earth.”