题目

任务型阅读  Linda usually gets up in the morning .She has breakfast at six thirty .And she goes to school at around seven o’clock .Usually she gets to school at seven fifty .Ten minutes later （以后）school starts （开始）.She has four classes in the morning .At twelve fifteen ,she eats lunch at school .In the afternoon ,she isn’t busy .After school she does her homework and plays with other students .In the evening, her parents come back from work .Her mother makes dinner and then they have dinner together .After dinner Linda and her mother often read books for half 19．下列说法中，正确的有（　　）（1）9的相反数是9；（2）六边形的内角和是720°；（3）抛物线y=x2-2x-3，当-1＜x＜3时，y＜0；（4）顺次连接四边形各边中点所得四边形一定是菱形．A．1个B．2个C．3个D．4个