David began to work in this factory 10 years ago(改为同义句）David ____ ____in this factory ____ ____ ____

David began to work in this factory 10 years ago(改为同义句）David ____ ____in this factory ____ ____ ____ After ＿(test) the machine,they began to work. My father began to work at 9：00同义句 He began to work in his thirties是什么意思? It was in 1990 ------he began to work.It was 1990 ------he began to work.用when/that填空 She began work immediately这句话有没有错啊?是不是应该是begin to work? Professor Luo began to work in this lab five hours ago的同义句改为：It _____ ______ five hours _____Professor Luo began to work in this lab My brother began to work when he was sixteen. My brother began to work ---- ---- ---- ---- sixteenHe is the oldest teacher in the school.He is ----- ---- ---- ---- teacher in the school. they (know)each other since they (begin) to work in that factry.请问正确时态是什么呢?1.knew.began.2.have known.began.3.had konwn.began. they began to work instead to make life better 怎么翻译? To hold the show successfully,she began to _______2 months ago.A.work on it B.work it on Not until three years ago,did he begin to work outside.这句子中为什么不用 he began to work 对一个英语句子感到奇怪When I began work on the case on Tuesday,we looked for the stranger.(这个句子中“ begin work on.”为什么不用“began working on.”或 “began to work on .”请帮做出解释 用old,my,was,to,father,he,years,began,when,when,work,twenty连词成句 he went into his room, turned up the light and began to work这句话对不对 His father began to work as___as he was seventeenAold Bearly Cfar Dbefore哪个为什么? then the sons began to work at once是什么意思翻译成中文 速度啊! His father began to work since he was seven years old.这个句子有错吗?