Our parents advised us________out alone at night because it was dangerous．
A．to go
B．not to go
C．going
D．don’t go
Shen Nong was the first to________tea as a drink．
A．discover
B．look for
C．find
D．find out
A lot of food________to that country after the war was over．
A．was sent
B．are sent
C．is sending
D．sent
Oh，this is really a big shop．Do you know when it________？
A．was built
B．built
C．has built
D．has been built
C
Imagine the situation．You are driving alone in a desert or on a mountain．You have no idea where you are．You passed the last house two hours ago．Then your car breaks down．It is night and it is cold．You have no mobile phone．What do you do？Well，next time take a GPS with you．This invention may be able to help you．It is a device(装置)which uses satellites to find the user’s position(位置)．It can find your position within 20 metres．A GPS cannot start your car，but at least you will know where you are．
GPS，which means Global Positioning System，is a small radio receiver．It looks like a mobile phone．You can hold it in your hand，or put it in your pocket．It is sometimes put into a watch or a telephone．We also find GPS devices in cars，planes，or boats．Some of these devices have electronic maps，so you know where you are．For example，in a city they can tell you the name of the street．
There are three parts to the Global Positioning System．The first part is the receiver．You can hold it in your hand，or have it fixed into your car，plane，etc．The second part is a group of satellites orbiting the Earth．The receiver contacts at least four of the satellites and calculates(计算)its position．The third part of the system is a network of ground stations．They are all over the world．They control the satellites and make sure they are working well．
Some people think that in the future the GPS will be as common as the mobile．They are becoming cheaper and more and more accurate(精确的)．There are also new uses for the GPS．Perhaps they will become like watches．Everyone will have one and you will never be lost again．
1.According to the passage，with the help of the GPS，people________．
A．can’t be lost in a new city
B．can’t find their way in different countries
C．can learn about the culture of an unknown place
D．can spend the least time getting to another place
2.We can learn from the passage tha________．
A．there are three parts to the GPS
B．a GPS can’t be put into a watch
C．a GPS can help you start your car
D．the GPS are becoming more and more expensive
3.The underlined word“They”in paragraph 3 means“________”．
A．Receivers
B．GPS devices
C．Satellites
D．Ground stations
4.The passage is mainly about________．
A．the history of the GPS
B．the introduction of the GPS
C．the shape of the GPS
D．the three parts of the GPS
5.What can we infer(推断)from the passage？
A．All GPS devices have electronic maps．
B．People in many countries will use the GPS for free．
C．The receiver of the GPS contacts at least five of the satellites．
D．The GPS will become more and more common in everyday life．
B
Today，roller skating(滑旱冰)is easy and fun．But，before 1750，the idea of skating didn’t exist(存在)．That changed because of a man named Joseph Merlin．Merlin’s work was making musical instruments．
One day Merlin received an invitation to attend a music party．He was very pleased and a little excited．As the day of the party came near，Merlin began to think how to make a grand entrance(隆重登场)at the party．He had an idea．He thought he would get a lot of attention if he could skate into the room．
Merlin tried different ways to make himself roll．Finally，he decided to put two wheels under each shoe．These were the first roller skates in the world．Merlin was very proud of his invention and dreamed of arriving at the party on wheels while playing the violin．
On the night of the party Merlin rolled into the room playing his violin．Everyone was surprised to see him．There was just one problem．Merlin had no way to stop his roller skates．He rolled on and on，suddenly，he ran into a huge mirror that was hanging on the wall．Down fell the mirror，breaking into pieces．Nobody forgot Merlin’s entrance！
1.The idea of roller skating didn’t exist________．
A．until 1750
B．after 1750
C．since 1750
D．from 1750
2.What was the job of Joseph Merlin？
A．Making shoes．
B．Making toys．
C．Making mirrors．
D．Making musical instruments．
3.Merlin didn’t________at the party．
A．play the violin
B．have any ways to stop his roller skates
C．roll into the room
D．get a lot of attention
4.Merlin stopped rolling when________．
A．he wanted to stop
B．he ran into a window
C．he ran into a huge mirror
D．he knocked someone
5.Which is the best title of the passage？
A．How to use the roller skates
B．Merlin and the first roller skates
C．How to make musical instruments
D．Merlin and the first violin
