如图，A，B的坐标为（2，0），（0，1），若将线段AB平移至A₁B₁，则a+b的值为（　　）

读图文材料，回答问题。

全球变暖导致的环境变化越来越引人关注。地理小组的学生将图8中近十几年来（阴影所示）相关数据的变化趋势与以前进行了比较。

学生经比较后得出的结论，与图8所示信息相符的是（4分）

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    On Sundays, Li Lei gets up at six thirty. He has 1 at eight. Then he helps his mother 2 the housework（家务劳动）. At ten o'clock he leaves 3 and goes shopping 4 bike. At about eleven o'clock he comes 5 home.

    He likes 6 very much. He helps his mother with the cooking. They 7 lunch at twelve.

    In the afternoon he often 8 games with his friends. They have 9 at six thirty. In the evening he does his homework. Sometimes, he 10 TV. He goes to bed at nine.