A. many different games with balls B . many different kinds of games
C. only one ball game D. different games with similar rules
55. The best title for this selection is _____ .
A. The First Ball Games B . How Egyptians Children Played Games
C. Egyptian Sports D. The Beginning of Sports
E
If your mother wants to tell you something , she uses words . Birds can not talk as we do . But some birds can make sounds to warn their young of danger . They have their own ways to make the young birds do certain things.
The jackdaw is a kind of blackbirds that lives in Europe. Jackdaws live together in flocks ( 群) .Young jackdaws do not know their enemies. When an older jackdaw sees a dog , it makes a loud tattling (格格响的)sound. The young birds know this sound means an enemy is nearby. The sounds warns them to know their enemy .
If a young jackdaw is in a dangerous place, a jackdaw parent flies over him from behind .The parent bird flies low over the young bird’s back, the parents’ tail feathers move quickly from side to side. It is trying to say ,“Follow me .
At the same time , the parent calls out , “ Key-aw ,Key-aw . The parent means , “ Fly home with me . The young bird then follows the older one home .
Young jackdaws do not have to learn what certain sounds mean. They know the meaning of these sounds from the time they hatch (孵化) .
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