1.Maybe a pencil,some kinds of pens.rulers and some books.
2.They are all made in factories.
3.There have been many thousands of inventions,large and small,in human history.
4.We don't know.
5.They've changed the world.
1.a girl
2.seven;week
3.name five
4.后天
5.前天
1.When you reach the age of 25,your weight will get 5 kg more.
2.13 years after,there will be no need for Peter to wear glasses.
3.I'm not good at English,I must practise it more.
4.Boys must wear white T-shirt,gray or white socks.
5.It gets dark later in winter.