2、 _______(现今)， some high school students are not so well-behaved as they used to be .

1、 A salesperson has to be a ________ in today’s competitive market.

15．According to the passage， many other inventions were ＿＿＿＿＿＿＿．

　 A．the dreams of Christopher　　　 B．the results of Christopher's experiment

　 C．the cause of Christopher's idea　 D．the wishes of Christopher

单词拼写(10)

14．Which of the following can push the hovercraft forward rapidly？

　 A．Cushioned air．　　　　　　 B．The air that sucked in．

　 C．The air that blew out．　　　 D．The air on the surface．

13．The underlined word “sucking” in the second paragraph probably means “＿＿＿．”

　 A．taking with great force　　　　　　　 B．drawing with great force

　 C．pushing with great force　　　　　　　 D．pulling with great force

12．The aim of the experiment in 1950 was ＿＿＿＿＿＿＿ ．

　 A．to speed up the boats　　　　　　　　 B．to change the world

　 C．to make the boats more comfortable　　 D．to improve vacuum cleaner

11．The passage is mainly about ＿＿＿＿＿＿＿ ．

　 A．Christopher，an ordinary but imaginative engineer

　 B．Christopher and his wife's vacuum cleaner

　 C．Christopher and his invention　　　　　　　　 D．Christopher and his discovery

10．In the story the relation of the big strong tree to the thin one is like that of ＿＿.

　 A． the young father to the old neighbor　　　　　　　　 B． parents to their children

　 C． the old neighbor to the children of the young father　　 D． grown ups to their parents

C

　 In 1950 an ordinary but imaginative electrical engineer named Christopher Cockerell began an experiment that was soon to change the world． He came up with an idea to make boats go faster， by using a vacuum cleaner．

　 Using his wife's vacuum cleaner he was able to reverse the motor so that it blew instead of sucking． The air that blew out beneath acted as a cushion against surfaces． Years later， his principle of cushioned air made it possible for the first hovercraft to be successfully built and tried out． A journey along the Amazon River proved to the world that the hovercraft was both wonderful and useful．

　 The invention that began in the kitchen and the boatyard of an ordinary home led to a thousand other inventions． Today hovercrafts carry passengers in comfort over rough channels and seas．

9．At last the old man told the young man ＿＿＿＿＿＿＿ ．

　 A． that he should be strict with his children if they could not yet stand alone

　 B． that he should always be strict with his children　　 C． that he should be hard on them

　 D． that he should tie his children until they are ready to stand alone

8．When can the string be taken away？＿＿＿＿＿＿＿ ．

　 A． When the old man has left　　　　　　　　 B． After you have untied it

　 C． When the young man has untied it next time

　 D． When the young tree grows strong enough