六级练习2012.02.27
[audio]http://sound.yywz123.com/tingbbs/cet6/cet620120227.mp3[/audio]How can you tell which direction? By day, look for the Sun. _____________________________________________. At night, use the Big Dipper to help you find the North Star. It would be better to bring a compass because its needle always points north.
How do you know how far you have gone? ____________________________. Each step is about two feet. You’d better wear a pedometer which is a tool that counts steps. If you know where you started, which direction you are heading, and how far you have gone, you can use a good map to figure out exactly where you are.
Today there is a new way for travelers to figure out where they are. It is the GPS. It has 24 satellites that orbit the earth and ________________________. Someday you may carry a small receiver as you hike and use GPS to find out if you are there yet!
**** Hidden Message ***** 1.it is in the east of morning and west in afternoon.
2.you could count every step.
3.constantly broadcast the positions.
页:
[1]