Thank you for invitation. I am looking forward to that party.
A:a
B:an
C:the
①他从中午一直忙到太阳落山,弄得 jīn pí lì jìn____。
②今天我要讲的故事是《wáng yáng bǔ láo____》。
③他很后悔没有接受街坊的quàn gào____。
—Do you want to keep goldfish?
—No, they are ______ difficult for me______ take care of.
小明做了如下操作:
将△ABC绕着边AC的中点旋转180°得到△CEA,将△ABD绕着边AD的中点旋转180°得到△DFA,如图②,请完成下列问题: