阅读理解.
Mark Twain left school when he was twelve. He had little school education. In spite of this,
he became the most famous writer of his time. He made millions of dollars by writing. His real
name was Samuel Langhorne Clemens, but he is better known all over the world as Mark Twain,
his penname.
Mark Twain was born in 1835 and he was not a healthy baby. In fact, he was not expected
to live through the first winter. But with his mother's care, he managed to survive. As a boy, he
caused much trouble for his parents. He used to play jokes on all his friends and neighbors.
He didn't like to go to school, and he often ran away from home. He always went in the
direction of the nearby Mississippi(密西西比河). He was nearly drowned nine times.
After his father's death, Mark Twain began to work for a printer, who only provided him
with food and clothing. Then, he worked as a printer, a river-boat pilot and later joined the
army. But shortly after that he became a miner. During this period, he started to write short
stories. Afterwards he became a full time writer.
In 1870, Mark Twain got married. In the years that followed he wrote many books including
Tom Sawyer in 1876, and Huckleberry Finn in 1884, which made him famous, and brought him
great fortune.
Unfortunately, Mark Twain got into debts in bad investments(投资) and he had to write
large numbers of stories to pay these debts. In 1904, his wife died, and then three of his
children passed away.
At the age of 70, his hair was completely white. He bought many white suits and neckties.
He wore nothing but white from head to foot until his death on April 21, 1910.
1．In his childhood, Mark Twain, ________.
A．learned a lot at school
B．he often went swimming with other boys
C．his mother often worried about his safety
D．he often played games with other boys
2．Which of the following shows the right order about Mark Twain?
a. He became a miner.b. He worked as a printer.
c. He got into debts.d. His father died.
e. He became a full-time writer.F. He joined the army.
A. a-d-b-c-e-f
B. d-b-f-a-e-c
C. d-a-f-e-b-c
D. c-b-d-f-e-a
3．In order to make a living, Mark Twain _______.
A．first worked as a printer
B．did many kinds of work
C．wrote stories in the beginning
D．joined the army after he worked in a mine
4．From the passage we can see that Mark Twain _______.
A．had a happy childhood
B．was a good boy and always did what he was asked
C．was very naughty when he was young
D．lived a pleasant life
5．Before his death, Mark Twain _______.
A. became a white man
B. was in low spirits
C. liked to buy all kinds of clothes
D. had nothing on
。但事实上苯的邻位二溴代物只有一种，所以假设是不正确的。而如果苯分子中存在碳碳单、双键交替排布，则选项A、B、C仍然成立，所以答案选D。