You have received a letter from your english-speaking pen friend, ben.
an awful task-to read boring books all summer! and the list is so long! i like reading but the books i like are usually not my school's
long is your school's list of books? what kind of books do you like to read? do you think an electronic book is a good choice when you're travelling in the summer, why?
write him a letter and answer his 3 questions. write 100-120 words.remember the rules of letter writing.
Previously, our ancestors measured time in different ways, for example: water clock, oil clock, sundial, obelisk. The first who knew that the day 24 hours were ancient Egyptians. They distinguished two parts in the day - dark and light time.
The first mechanical watches with a liquid escapement were made in Tang China in 725 AD by Yixing and Liang Lingzan. Then, every year, century, the clock became simpler and clearer. Nowadays there are electronic, radio frequency mechanical clocks. The most practical watch is an electronic one from such a watch you can even call to measure it, etc. The watch nowadays not only fulfills its function, but also people often use it as an accessory.
I believe that the clock has changed dramatically in its development.
1. G.S. was a British inventor and engineer. He is famous for building the first practical railway locomotive.
2. In 1829 he designed a locomotive known as the Rocket,, which could carry both loads and passengers at a greater speed then any constructed at that time.
I think this is his main invention.
3. R,S.was a British civil engineer.
4. He built several famous bridges including the Victoria bridge in Northumberland, the Britannia bridge in Wales, two bridges across the Nile in Damietta in Egypt and the Victoria bridge in Montreal ,Canada.