Before the end of his lecture,the professor may also _____ time for the students to ask him questions.a.lay asideB.brush asideC.set asideD.put aside

by the end of ,at the end of ,before the end of的区分 near the end of each class=before each class_____ 过去完成时时间状语区别,by the end of,by,before he finished answering the question before the end of the exam这道题哪儿有错? Before the weekend跟by the end of the week有什么区别? The end of the It was essential that we sing lease before the end of the month汉语怎么翻译? 英语翻译Hi,If you wanted these plates before 25th December the courier would be TNT or Parcelforce but the cost would be around £75 just for the shipping.If you wanted the plates to arrive by the end of December the cost of shipping is aroun The end of our The end of End Of The World end of the through the end of End of the Trail 英语翻译The years of manhood are naturally not the beginning of youth,but the end of the latter should not arrive before that of the former.... John said to his parents,''I had learned 500 chinese words by the end of last term.''变为间接引语by the end of last term不用改成by the end of the term before吗? the end of the world 和 the ends of the earth 都是世界尽头的意思,为什么一个是用 end ,另一个是用 ends ?还有 before the night ends 为什么end 加s ? At the end of the