③He turned over in bed . 他在床上辗转反侧。
turn over：仔细考虑
①He turned the new idea over in his mind . 他反复考虑这个新想法。
②He turned the question over in his mind . 他反复考虑这个问题。
12. He wrote a book called Qi Min Yao Shu during the years 533-544.
533-544年间，他写了《齐民要术》。
《齐民要术》，贾思勰著，是我国完整保存至今最早的一部古农书，全书92篇，分为10类，共113字，分别论述各类农作物，蔬菜、瓜果、竹木的栽培，家畜、家禽的饲养，农产品加工和副业经营等。
13. Here are five pieces of advice collected from Jia Si Xis’s book Qi Min Yao Shu .
下面五条意见都是从贾思勰的《齐民要术》一书中收集到的。
Here is / are……是一个倒装句型。
①Here are some examples .
②Now here the bus is coming . Here it is . 汽车开过来了它来了。
这句话也可以说：Here comes the bus .
③Here are some good phrases and sentences collected from the newspaper .
这儿是从报纸上搜集到的好的短语和句子。
!4. But if you go against nature and do things at the wrong time of year ,……
但是如果你不顺科自然，不适时耕作……
go against .“违反”、“违背”
①The game is going against them . 比赛情况对他们不利。
②They are going against our wishes . 他们违背了我们的愿望。
③It goes against my principles . 这违反我的原则。
15. Do not plant , for example , rice year after year in the same field .
例如，在同一块地里，不要年复一年地种稻谷。
year after year：年复一年地，一年一年地，常用来表示逐年重复。
①Year after year I have tad a letter from my teacher . 每年我都收到老师的来信。
②We have been to that place for a holiday year after year . 我们每年都在那度假。

The Great Wall of China winds across the country like a giant stone snake . It is 1,500 miles long . The wall crosses mountains and rivers . It reaches from the ocean on the east to the desert on the west .
The Chinese began their wall more than 2,000 years ago . They worked on it for hundreds of years . The Chinese wanted to keep out their enemies .
At the bottom , the wall is 25 feet wide . At the top it is about 15 feet wide . The sides of the wall are made of stone and brick , while the inside is filled with earth . Parts of the wall rise as high as three-story building . Every 100 yards along the Great Wall there was a watchtower where soldiers used to stand to watch for enemies approaching (到来). The road on top of the wall is wide enough for two wagons (马车)to pass . If we were to build such a wall now , we would use modern machines . But the Chinese had to build the wall all by hand . If the Wall were in our country , it would reach from the state of New York to Nebraska . The Great Wall of China is the longest wall ever built .
1. The Great Wall of China is .
A. 15,000 inches long B. 10,500 yeards long
C. 150 feet long
2. The story does not say so , but it makes you think that the Great Wall .
A. has a gate every 100 yards B. is used as a road today
C. is still as useful today as it was
3. The inside of the Great Wall is filled with .