Zu Chongzhi was one of the greatest mathematicians（数学家） in ancient China.He was born during the Northern and Southern（1） （ dynasty）.From a young age，Zu was taught natural science，astronomy（天文学），math and so on.The little boy was （2） （ interest） in all of these subjects，especially in （3） .
Zu was best known for his calculation（计算） of pi （π）.According to the record，he did all the work using nothing but wooden sticks. （4） took him lots of time to work out the value —（5） 3.1415926 and 3.1415927.No one at that time was able to do better than Zu.And now the achievement is still praised by people around the world.In order to remember Zu，some mathematicians suggest （6） （call） pi"Zu Lv".
Zu was successful not only in math，but also in astronomy.He worked out that a year should be 365.24281481 days long and created the Daming Calendar. （7） ，government officials at that time did not agree with Zu.The great mathematician （8） saw his calendar put into use.Almost ten years after his （9） （die），the new calendar was finally accepted.
Zu was an inventor，too.He once made a vehicle（车辆） （10） carried a pointer （指针）.No matter how the vehicle turned，the pointer always pointed to the south.
In the （1） （south） part of China，eating qingtuan at the beginning of spring is a kind of tradition.Chinese people （2） （start） to eat it more than 2，000 years ago.It is made of sticky rice（糯米）and red bean paste（红豆沙），and is famous for its softness，freshness and sweetness.
People living in the Yangtze River Delta（长江三角洲）usually put qingtuan on the tombs（墓）of their dead family members to cherish the past memory.Making qingtuan is also a chance for family members to get together at home.It（3） （real） takes time and effort to make the snack.
Now，qingtuan has already spread its special taste to the northern part of China.Qingtuan has many different （4） （taste） inside it，such as apples and bean milk，to meet customers' tastes.The difference of the taste shows that it's getting more and more popular across the whole country.
Even though there is warm weather and green leaves in spring，the season wouldn't be complete（5） （with）a taste of qingtuan.
Fill in each blank with a proper word with the help of the given letter.
Have you ever imagined （1）t to other countries without your paper passport？In the （2）f ，there will be a new kind of passport called the "cloud passport" and it will come into your （3）d life someday.Your paper passport will become history.
The cloud passport will have your name，photos and so on.It is easy （4）f you to check them on the computer.、
If you take a paper passport with you，you might lose it. （5）H ，with the cloud passport，you don't have to worry about that.Do you think the cloud passport is a great idea？
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believe they two easy hard |
On April 13，China's women's soccer team won a ticket to this summer's Tokyo Olympics.
But the win didn't come（1） .Team China was still behind 2﹣0 after the first half of the（2） section.Luckily，player Wang Shuang scored two goals later.
"We never gave up，even when we were 2﹣0 down，we always（3） we could come back，" Wang said. "We deserved（值得）the win because we've trained hard for over 100 days.The（4） we train，the luckier we can be...We had to fight to the last minute. "
This fighting spirit has always been with the team.People even praised（5） as "Steel Roses".
用方框中所给单词或短语的适当形式填空。
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ready，be，daily，for，nothing，such as，only，return，thousand，many |
The more you read，the more things you know.The more you learn，the more places you'll go.Reading is important （1） everyone.China has （2） of public libraries in cities，towns and even borrow books，and it costs （3） to borrow them.In some places you may borrow as （4） books as you want，but in others you are limited to a certain number of books for several weeks so that you can have enough time to finish all the books you've borrowed.
The latest novels are always in great need，and non﹣fiction books， （5） books on history，science and gardening，are well﹣loved，too.
If the books you need are out，you may ask for them to be kept for you when they （6） .And when the books are back and are （7） for you，the librarian will let you know.
Most public libraries also have a reading﹣room.There are tables and desks at which you can sit and read the （8） newspapers and all the other important periodicals （the weeklies，the monthlies and the quarterlies ） .In the reference library there （9） dictionaries，encyclopedias，books of maps and other useful books.But you can （10） use these books there.You cannot take them out.
用方框中所给单词或短语的适当形式填空。
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ready，be，daily，for，nothing，such as，only，return，thousand，many |
The more you read，the more things you know.The more you learn，the more places you'll go.Reading is important （1） everyone.China has （2） of public libraries in cities，towns and even borrow books，and it costs （3） to borrow them.In some places you may borrow as （4） books as you want，but in others you are limited to a certain number of books for several weeks so that you can have enough time to finish all the books you've borrowed.
The latest novels are always in great need，and non﹣fiction books， （5） books on history，science and gardening，are well﹣loved，too.
If the books you need are out，you may ask for them to be kept for you when they （6） .And when the books are back and are （7） for you，the librarian will let you know.
Most public libraries also have a reading﹣room.There are tables and desks at which you can sit and read the （8） newspapers and all the other important periodicals （the weeklies，the monthlies and the quarterlies ） .In the reference library there（9） dictionaries，encyclopedias，books of maps and other useful books.But you can （10） use these books there.You cannot take them out.