问答题
Outline: 1. The types of friend. 2. The criteria of an ideal friend. 3. The importance of having a good friend.
A.capable of using two languages B.both clever and confident C.aware of their own limitations and strengths D.independent of their parents
A.they have to watch out for possible attacks B.their brain hemispheres take turns to rest C.the two halves of their brain are differently structured D.they have to constantly keep an eye on their companions