Started in 1636, Harvard University is the oldest of all the colleges and universities in the United States. {#blank#}1{#/blank#}

    In the early years, these schools were much alike. Only young men went to college. {#blank#}2{#/blank#} Little was known about science then, and one kind of school could teach everything that was known about the world. When the students graduated, most of them became ministers or teachers.

    In 1782, Harvard started a medical school for young men who wanted to become doctors. Later, lawyers could receive their training in Harvard's law school. {#blank#}3{#/blank#} Soon it began teaching American history.

    As knowledge increased, Harvard and other colleges began to teach many new subjects. {#blank#}4{#/blank#}

    Today, there are many different kinds of colleges and universities. {#blank#}5{#/blank#} There's so much to learn that one kind of school can't offer it all.

A. In 1825. besides Latin and Greek, Harvard began teaching modern languages, such as French and German.

B. Most of them are made up of smaller schools

C. Yale, Princeton and Columbia were opened soon after Harvard

D Students were allowed to choose the subjects that interested them

E. All the students studied the same subjects, and everyone learned Latin, Greek and Hebrew

Athletes from various countries displayed the charm of competition sports during Beijing Winter Olympics. One of the reasons why this Winter Olympics can be successfully held is the robots who work hard behind the scenes. 

In the dining hall, instead of human waiters, food arrives from the ceiling. To our surprise, the cooking robot can make delicious dishes according to the programs; food even like burgers are being prepared automatically. 

It doesn't stop there. Elsewhere in the media center, a robotic arm is serving up cocktails. It takes just 70-90 seconds to measure, shake and serve. 

Look at this robot. Although it is only 140 cm tall, it only takes one minute to sterilize（灭菌）36 square meters. The space even more than 1,000 square meters can be easily dealt by itself. The robot can hold 16 liters of disinfection（消毒）water at one time, and spray（喷雾）around through the small fan above its head. 

Everyone knows a power nap(小睡) feels good. If power naps fit right into your normal sleep/ wake cycle(周期), they can really help you get through the day.

Our bodies have a timekeeper called the circadian rhythm(昼夜节律). It helps you fall asleep, wake up, and feel more or less tired throughout the day. It also changes during the day, as shown in the picture below.

As we can see, the circadian rhythm is low between 2:00 and 4:00 pm. To improve your attention, productivity and memory, a power nap may be the answer.

In studies, a 10- minute afternoon nap is the best in improving your energy. And, it makes sense to nap around 2:00 pm.

Besides the length and the timing, there are other ways to have power naps:

●Try deep- breathing as you start.

●Choose a quiet, darkened place. A sleep mask may help.

●Lie down or sit in a comfortable chair.

●Listen to soft music.

●Give yourself a few minutes to refresh after your nap. Try a bit of stretching(伸展) and walking around.

 Most children love to ride bikes. {#blank#}1{#/blank#} If you know the following rules, you' ll be safe. 

●{#blank#}2{#/blank#} There are many different kinds and sizes to choose from. When you buy a helmet, make sure it fits. 

●Ride along the right- handed side of the road if you aren't going to make a left turn or pass other people

●If you want to cross a busy street, you should get off your bike and wait for the light to change, and then walk it across the street. 

●Keep your eyes and ears open. Do not wear headphones. {#blank#}3{#/blank#} Stop at all the stop signs. 

● When you ride with a friend, do not ride next to each other. {#blank#}4{#/blank#}

●Keep your bike in good repair and clean. {#blank#}5{#/blank#} Or it could make you have an accident. 

提示: different eating habits and customs;

 prefer steak (牛排);

 make a loud noise;

 talk with others

注意：1. 短文需要包含以上所有提示内容，可适当发挥；

2. 词数:80~100。