?Which section (A, B, C, or D) does each statement 1--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.