根据句意和所给的首字母填空
①The school ____（旅行）is from November 12 to 13. The students will have fun.
②-Do you have an Art F____（节日）?
-No, we don't.
③They have a birthday p____（聚会）for her son.
④His brother is the first in the English ____（测试）．
⑤I'm very ____（忙碌）now, so I can't go with you.
⑥There are twelve ____（月）in a year.
2AB(g)达到平衡的标志是