They are not serious enough at that age ,RT````

帮忙翻译一句话they are not serious at that age They are not serious enough at that age ,RT```` i think teenagers should ______ drive.they are not serious enough1.be allowed to 2.not be allowed to 3.not allow to If you are not serious, then do not bother.是什么意思 -----i do not think teenagers should drive cars,---（i agree）,they are not serious enough.怎么翻译,有无固定用法,或回答 . they are not the().They are different 翻译I suppose you're not serious,are you He has made some spelling mistakes in the paper; ______,they are not serious.A.but B.therefore C.even if D.however --Are they ( ) buuks?No,they are not .--They are ( ) buuks. They are not ( ) for their The Smiths are not rich. They are ( ). they do not enjoy还是they are not enjoying? 急.C No,they are not.D Yes ,they are no,they are not reps.they are our employees 语法题,I suppose you are not serious,________?A.do I B.don't I C.are you D.aren't you这个什么情况下用don't ________,I should ask them some questions.A.Should they come to us B.If they come to usC.Were they come to us D.Had they come to usS 英语翻译Unfortunately,the measures that I have suggested,even in the unlikelyevent that they are adopted,would probably not do a great deal to correct whatseems to me a serious mismatch between the conditions of the new economy andthe institution Are you serious? Sixteen-year-olds should not be allowed to drive because they aren't＿＿at that age.补充：A.enough serious B.serious enough C.much serious D.serious much（求详解）