She is typing a letter.She is sweeping the floor.请问typing a letter.和sweeping the floor中间一个用a一个用the请问词用a?什么词用the?

A person is typing怎么翻译? She is typing a letter.She is sweeping the floor.请问typing a letter.和sweeping the floor中间一个用a一个用the请问词用a?什么词用the? She is very enthusiastic about typing 什么意思 1.A friend is now repairing the piano in the workshop.2.They are building a new bridge over the river.3.The postman delivered a newspaper this morning.4.My mother gave me a present yesterday.5.The police have arrested the thief.6.He was typing a lett 1.Ann is very tired because she ___for hours.a.typed b.types c.is typing d.has been typing选c为什么不对?我知道正确答案,可我想知道为什么选C不对?那选C代表什么？ Who is the boy ___ by the window?a、typeb、 typing c、 to be typing d、 typed 小学英语－－写出下面句子的同义句1.I like Money King best.Money King is my _________ __________.2.How honest the girl is!_______ _______honest girl she is!3.It rained and rained.It rained____________and __________.4.Tim received a lett _______ the exercises ,she saved them in the disk.A.Typing B.Having C.Having typed D.After typed求翻译,in the disk because my chinese typing is not good. 什么意思 ( )is she?she is a teacher. she is a teacher Is she a teacher? Is she a teacher She is a student she is a teacher. she is a teacher. she is a driven She is a sleep