first they should work the cost out carefully.first可以单独用吗?和at first有什么区别

first they should work the cost out carefully.first可以单独用吗?和at first有什么区别 they should put their work first .(改为一般疑问句) ＿＿they ＿＿their work first? what should wo do for aids patients In Russia people should when they meet for the first time As teacher,wo should let our Ss do ( )to develop theri interestsA.whatever do they like B.whatever they are likec.whatever will they like d.whatever they like what they talk about is what wo should learn,这个意思是不是他们谈到的就是我们需要学习的如不对, 同义句转换 they can not decide when they should leave the school they can not decide _____ ___________the schoolplease tell me what i should do first please tell me ______ _______ _________ first is only right that we should hit back when they saw it fit to hit us first. Teenagers should learn how ____ as a team first . A.play B Playing C.to play D. can they play wo AThe couple couldt decide which flat they should choose at first.(保持原意)The couple could decide which flat ( )( )at first. 英译中的题目1.What’s the woman’s idea?They should read a newspaper first.They should do some shopping first.They should go to the cinema first.2.Where was the woman last week?She stayed at home.She was on a holiday in France.She went to Fra i think parents should first help their kids （这里为什么没有to）know study iswhat they should be(为什么有be）doing? wo should _____(listen) to the teacher carefully O thank you but wo should have a try what they,should they should housework do . To be well informed,you should be equipped with a computer____.[A.at first B,first]2.Children may be puzzled by this new invention ____,but later,they may ………….[A] first [B] at first顺便再问一下,first和at first有什么不同?还有fir