Choose the best topic from A to F.

小题1:A breakfast is very important Because you have not eaten anything for the              Whole night. Your body needs food for morning study.

小题2:Some students go to school without breakfast. They eat instant noodles             when they are hungry. It is bad for their bodies and health. In fact，a good breakfast should be rice or bread, an egg, milk fruit and vegetables.

小题3:Nowadays,we can find ads everywhere，You can find them on TV, on many            Posters ，when you listen to the radio ,you can hear some ads. Even on Internet you also can find them in the web pages .

小题4:Some things can carry messages. For example, a sign at the bus stop can help You to know which bus to take. Signs on the door tell you where to go in Or out.                   Have you ever noticed that there are a lot of signs around you and that you receive messages form them all the time?

小题5:Many people can use computers, but few of them know how to look after them. Remember the following :keep your computer, in a cool, dry room,         don’t put water or food near your computer, keep your screen clean and not too bright.

X线的诊断作用，最准确的描述

A．是牙周疾病诊断的决定性手段

B．是非常重要的诊断工具，但不能取代临床检查

C．能独立给牙周疾病作出正确诊断

D．牙周病的诊断需要拍咬牙合翼片

E．以上均对