(1/2)Before,I talk with（_ ）scientist ,I had never met [ _] clever perso

(1/2)Before,I talk with（_ ）scientist ,I had never met [ _] clever perso I stopped him before he began to talk with me. Before I give my talk in front of the class, I was a little tense.翻译 I was giving a talk to a group of people.I____ the same talk to other groups before. w=-1/2-(√3/2)i 求1+w+w^2+.+w^2002 (1/2)-I will be back before Christmas.-I wish you ＿back before Thankgivi set talk off clear for W=100to 200 prime=.t. for I=2to W-1 if mod(W,I)=0 prime=.f. exit endif enddo哪里错掉了.嵌套错误又是什么.不是很懂若改为任意范围内的素数和（100与200用m,n代替呢.该怎么写）非常感谢.机试 I have to-----------English for half an hour before breakfastA.ListenB.readC.lookD.talk I was a little ____ before l gave my talk in front of the class Please don't talk so loud ___ others are sleeping.1,when 2,what 3,before 4,while 翻译talk before many people 英语高手进,关于现在完成时的几个问题.1I have lost the pen which I bought the day before.为什么不能说成I lost the pen which I have bought the day before.2 By next sunday she will have stayed with us for three weeks.这句中的w 翻译I love that you are the last person who i want to talk before i go to sleep I love that you are the last person I want to talk to before I go to sleep at night. I love that you are the last person I want to talk to before I go to sleep at night. W:Have you ever met a foreigner?M:________第1空_________I know only a little English.W:I asked if you have ever met a foreigner.M:What do you mean by the word foreigner?W:________第2空_________M:No,I have never met a foreigner before.________ l love that you are the last person i want to talk to before i go to sleep at night 若w=-2/(1+根号3i),则1+w+w^2等于