what for,why not,what's up和so

what for,why not,what's up和so Routers and switchesI just design a network in city council for coursework.please give me a suggest that which router and switches are better.by the way,we got low budget.I‘m not ask what is router.I just want know,such as,what we are using,why,wha ---------------you join us for lunch?A what about B what if C why D why not You leave a message for your supervisor.What would you say?Call me!I would like to discuss the new figures.I am available all day at extension 123.Why not return my call when you get back from your 3 hour lunch break?A client comes to your office.Wha What if 和What about、Why not的区别_____ you join us for lunch?A.What about B.What if C.why D.Why not why don't you join us for breakfast?sure._________A.what to do?B.why not? why not 与what for如果A说 我们不养宠物 B想要养宠物 B要问A what for 还是why not Knowing what you can not do is more important than knowing wha --What?You failed the driving test again!--_____ A.So what B.How come C.Why not D.What for Jack,will you please paint the door yellow?是回答Why not?还是回答 What for why can not forget you just for what who can tell meT＿T? what for = why 造句 what for =why吗? ____good weather!Why not go out for a walk?A.what B.how答案是what,请问为什么不用how? ____good weather Why not go out for a walk?A What B How a C What a D How What is the main them of American literature?What was Poe famous for?Wha全是美国文学方面的. confusing..what does long distance for long time may create conflicts between couples mean?why why not say separating for a long time may create conflicts between couples? what about和why not怎样区别?