You should wash your hands before_____meals.A：have B:having C:to have说答案,再说为什么选,

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• You should wash your hands before_____meals.A：have B:having C:to have说答案,再说为什么选,
• 英文字母前用a还是用an的问题,这是我从网上看到的：在26个英文字母中,a,e,i,o,f,h,l,m,n,r,s,x等12个字母的读音是以元音开头的,因此在这些字母单独使用时,前面用an.其余字母则是以辅音开头的,前面用a.如：Please pay attention to your spelling.You have dropped ________ ”m” here.(全国卷)A.an B.the C./ D.a【分析】答案选A.因为字母答案选m的发音是以元音[e]开头的,所以用an；这里的an的意义与one相当,表示“一个”.我想知道,为什么那12个字母里不包括字母u,u也是元音字母啊,按理说应该也包括,可是却没有含在里面,这是为什么呢?
• 【1】 What did your father ask you just now He asked me ＿＿.A.whom I was chatting withB.if I have finish my homework【2】He was last seen _________in his office at about 7:15 p.m..A.work B.working C.to work D.worked选哪个,为什么那个on sale 的意思不是【廉价出售】吗结果我们老师{孙玲燕}说是【上卖】（没错你没有看错）我和她说好像应该是【打折】她没理我再说一遍后它怒了说你爱怎么理解就怎么理解【1】题它说两个都对题出错了【2】题它说B C都对但是C翻译的不通顺所以否掉特此求证一下
• You should wash your hands before_____meals.A：have B:having C:to have说答案,再说为什么选,
• 1、-Have you finished your homework yet?-Not yet,I___to do it just a few minutes ago.A.get down B.set out C.set about D.set up（我感觉应该选C,可是答案给的B,为什么啊）2、A new technique ___out,the yields increased by20％.A.having working B.having been workingC.has worked D.had been worked（答案给的B 3、____all the time is the key to____progress in EnglishA.Practice,making B.To practice,makingC.Practicing,make D.To practice,make（答案给的B）
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