"The headmaster announces\d that the sports meeting is begining"中应是announces还是过去式announced还有一点，begin不是不可持续动词吗？怎么来了个正在进行？

Anno Domini Beats--Winter Of The Heart the headmaster a_____ school 求winter of the heart 的歌词anno domini beats Anno Domini Beats--Winter Of The Heart 的mp3 , a word from the headmaster talks with the headmaster是什么意思? The headmaster said everything,too 否定句The headmaster said ()()The headmaster said everything,too否定句The headmaster said ()() anno 是什么意思? the headmaster made them stand at the offered a letter of ____to the headmaster. I am the headmaster!Dare you don't respect the headmaster,should do! the teachers made Mr Wang headmaster为什么headmaster前面的定冠词a省略了 The headmaster saw the children playing on the playground变成复合句The headmaster saw the children__ __ __on the playground 句型转换 1.The headmaster saw the children playing on the playground.(改为复合句)1.The headmaster saw the children playing on the playground.(改为复合句) The headmaster saw the children _____ _____ on the playground.2.The headmaster saw That` all the headmaster said at the meeting .求翻译? with the p_____ of the headmaster,our class visitethe zoo Buon anno a tutti Anno domini是什么意思