Look at the statements below and the information on outdoor advertising on the opposite page.
Which section (A, B, C, or D) does each statement1--7 refer to?
For each statement 1--7, mark one letter (A, B, C, or D) on your Answer Sheet.
You will need to use some of these letters more than once.
1 Lighting system of billboard changes seasonally, which is remote-control.
2 One of the effects that digital technology has on outdoor advertising is to make clear pictures more durable.
3 Digital imaged advertising can save time and labor.
4 The companies requiring outdoor advertising can communicate with adviser on the Internet.
5 Advertisers can gauge their design before putting it into effect.
6 By using electronic technique, advertisers can find the most suitable display position to do outdoor advertising.
7 Signals received from satellite can help gather data.
答案：1 B 2A 3A 4C 5D 6C 7D