9A Unit 8 单元同步读写训练

一、完形填空
Sir Arthur Ignatius Conan Doyle was a Scottish doctor and writer. He was 1 for his stories about the detective Sherlock Holmes. In his stories, Holmes solved mysteries in a most 2 way,which interested readers all over the world.
Arthur Conan Doyle was born in 1859,Scotland. He is now 3 as "Conan Doyle". Conan Doyle was sent to school at the age of nine. He then 4 on to study at Stonyhurst College. From 1876 to 1881 he studied medicine at the University of Edinburgh. While studying,Conan Doyle also began writing short stories. His first story 5 out before he was 20. After graduating from university,he had a job as a doctor on the ship. While waiting for 6,Conan Doyle began writing stories.
Sherlock Holmes was first known to the 7 in 1887. Sherlock Holmes was a clever detective. He was 8 to solve almost all difficult cases.
In 1885,Conan Doyle married Louise Hawkins. She got a 9 disease and died in 1906. The next year he married Jean Elizabeth Leckie,who he had first met and fallen in love with in 1897. The couple lived a happy life. When Conan Doyle died of a heart attack at the age of 71,his last words towards his wife were "You are 10".

二、阅读理解
Criminals could soon be caught if they are cat owners. Using cat DNA,scientists can now look into one piece of cat hair and identify(确认)the cat,according to a new study.
In the past,scientists couldn't do that. It's because the hair doesn't have hair roots(发根),so it has little DNA. Also,cats' DNA is very similar. One piece of cat hair can seem like the hair of thousands of different cats.
Scientists from the University of Leicester,UK,found a new way. They found a special piece of DNA from the cat's hair. It has some parts that make a cat unique(独一无二的).
However,it's difficult to see the most unique parts because they are too small. So the scientists copy the DNA piece and make billions(数十亿)of copies. This way,they have a lot more pieces to look at. It's now much easier for them to identify a cat just by its hair.
In their study,the scientists said they can also use the same way to identify other pets based on their hair,such as dogs. So it will be easier for the police to catch criminals. There is usually pet hair at crime scenes. Although the "bad guys" try not to leave their DNA behind,it's difficult for them to clear away all the pet hairs,such as those on their clothes.
DNA to solve crimes
DNA is the genetic(遗传的)material found in all living things. It's unique,so it's usually used to identify people or animals. DNA can be found in blood,hair,skin(皮肤)and many other parts of the body. Police can take a very small piece of DNA and find out who it is from.
( )1. Why is it easier for the police to catch criminals if they are cat owners?
A. Because a cat's DNA is easier to tell apart from a human's.
B. Because a cat owner's DNA is unique.
C. Because a cat owner is more likely to lose hair.
D. Because the police can now find their cats by DNA.
( )2. What do scientists do to identify cats?
A. They tell the special smell of different cats' hair.
B. They find DNA in cats' hair and make copies of it.
C. They collect cats' hair and look at it carefully.
D. They find the DNA from the hair roots of cats.
( )3. The study suggests that ______.
A. pets usually have the same DNA pieces
B. one without a pet is hard to be caught
C. bad guys usually leave their own DNA at crime scenes
D. it is hard for criminals to clean all their pet hair
( )4. Who will most probably be interested in this text?
A. Cat sellers. B. Hairdressers. C. Police officers. D. Animal protectors.