A:①④⑤⑥
B:①③④⑤⑦
C:①③④⑤⑥
D:全部
13-6____7 15-5____9 14-5____8
11-3____7 12-4____12-5 11-2____12-3
已知a﹣b=1,则代数式2a﹣2b﹣3的值是( )
根据课文内容填空
Daming has got a____. It ____ walk. And it can dance. One day, hey will do____. They will do the housework. They will help children____. But they____do our homework.