为什么cigarettes have a normal demand curve

为什么cigarettes have a normal demand curve In the Britain,sales of cigarettes（ have been reduced） quite a lot in the last ten years为什么要用BEEN 不能直接用HAVE REDUCED In the Britain,sales of cigarettes（ have been reduced） quite a lot in the last ten years in Britai为什么用完成时? He smokes three packs of cigarettes a day,which definitely doesharm to his health 这句话为什么用does And smokers have to spend a lot of money 65 cigarettes (香烟)那个“65”那里应该填什么介词？是of还是in还是on 首字母填空 I have a friend,and she u____ to smoke cigarettes.She began smoking at the age of 13I have a friend,and she u____ to smoke cigarettes.She began smoking at the age of 13.She mixed with the wrong group and she though they were c____ bec he threw all the cigarettes into the dustbin as if ____ to quit smoking.a.determined b.determiningc.to determine d.determine为什么选a A packet of cigarettes like this costs 24 I need to buy a pack of cigarettes from the supermarket.I wish you___smoking.A would have stopped BB have stopped C stop D stopping 答案是哪个,为何? 帮我分析下：i'm not a heavy smoker.a pack of cigarettes usually _________ me three days or more.aA .怎么翻译这个句子啊?为什么不选 C A:lasts B.meets C.covers 为什么选A? I have a friend and she used to smoke cigarettes……I told her she should spend……这是12选10 能把原文发过来么 给20 until的相关时态问题Mr.Keller ( ) forty cigarettes a day until he gave it up.A had somked B smokes Chave smoked D smoked为什么选D不选A __ (Determined/Determining)to give up smoking,he threw away his cigarettes.为什么答案是Determined smoking cigarettes is还是does harm to your health.能说说为什么吗 不懂啊 2.The leading cause of his disease is that he smokes __ more cigarettes ___ is reasonable.A.much,than B.many,thanC.much,than itD.many,than it为什么不是C? He seemed to have___ his cigarettes.A.take offB.give up Oh,i see a box of cigarettes.please don't_____________in public piaces. have a new movie.为什么用have?