–No, we can't. We need _______ days.

古人云：“吾日三省吾身”的修身方法。这种认识自我的方法属于（  ）

   Sunday 1 the favorite day for our family. My parents 2  not 3 work. My sister and I 4 go to school. We 5 at home and 6 in the morning. In the afternoon, my sister and I 7 out to buy some different things. My sister likes songs. She 8 new tapes. I buy story books, a frisky, a kite and things 9 that. We also buy some small gifts (礼物) for our parents. We 10 them. They love us very much. We live in a happy family.

如图所示，在⊙O中，＝，则在① AB=CD ②AC=BD ③$\angle AOC=\angle BOD$ ④中，正确的个数是（     ）