单选题 A. AUTO NORMAL
B. MANUAL NORMAL
C. AUTO LIGHT
D. MANUAL LIGHT
E. AUTO DARK
F. MANUAL DARK

填空题 If you have just bought your photocopier and you hold down the EXPOSURE key for ten seconds, you will see a flashing light at ______.

填空题 If the Exposure level is set at LIGHT and you, press the EXPOSURE key twice once, you will change the setting to ______.

填空题 If you are at AUTO NORMAL ("A") and you press the EXPOSURE key twice for only a second or two, you will change the setting to ______.

填空题 If you are at MANUAL NORMAL and you press the EXPOSURE key three times, you change the setting to ______.