----I’ve bought a box of chocolates for our daughter.----Oh!how good a dad!But she doesn’t like sweet things,_____that?A、don’t you know B、haven’t you known C、didn’t you know D、hadn’t you known

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----I’veboughtaboxofchocolatesforourdaughter.----Oh!howgoodadad!Butshedoesn’tlikesweetthings,_____th

----I’ve bought a box of chocolates for our daughter.----Oh!how good a dad!But she doesn’t like sweet things,_____that?A、don’t you know B、haven’t you known C、didn’t you know D、hadn’t you known
----I’ve bought a box of chocolates for our daughter.
----Oh!how good a dad!But she doesn’t like sweet things,_____that?
A、don’t you know B、haven’t you known
C、didn’t you know D、hadn’t you known

----I’ve bought a box of chocolates for our daughter.----Oh!how good a dad!But she doesn’t like sweet things,_____that?A、don’t you know B、haven’t you known C、didn’t you know D、hadn’t you known
回答的那个人用很肯定的语气陈述了他女儿不喜欢吃甜食这个事实,也意味着说完之后那个DAD已经知道了,所以他的not know that已经是发生在过去的了,因而用didn't.

为女儿买巧克力是完成时而知道她不喜欢吃甜的东西是过去就知道的因此用过去时

虚拟语气
一般情况下，主句与从句的谓语动词形式应前后呼应。但是，如果主句与从句的动作发生的时间不一致（从句的意思是，“难道你以前不知道么？”），谓语动词形式要符合语意。
另有：If I had a bike(now), I would have lent it to you yesterday. 假如我有自行车，昨天早就借给你了。(主句与过去事实相反，从句与现在事实相反。...

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虚拟语气
一般情况下，主句与从句的谓语动词形式应前后呼应。但是，如果主句与从句的动作发生的时间不一致（从句的意思是，“难道你以前不知道么？”），谓语动词形式要符合语意。
另有：If I had a bike(now), I would have lent it to you yesterday. 假如我有自行车，昨天早就借给你了。(主句与过去事实相反，从句与现在事实相反。) I am very sorry if I had done anything wrong to you, but I am sure that it was unintentional.(如果我当时对你作错了什么事，我向你表示抱歉。但我敢保证我不是故意的。)

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我同意miranda78cm的选择：C
仔细把妈妈的话分析一下，实际上在说爸爸应该明白女儿不喜欢吃甜食，什么时候应该明白，就在他准备买Chocolate 的时候就应该明白，所以妈妈实际上在反问爸爸在买之前那个时候难道不明白吗。

I`ve just bought a CD_____Heart Strings.A.call B.called C.is calling D.calls 这句英文求汉语翻译I've just bought a Qiaodan sportswear in that supermarket I've bought a house of two s() and my parents live with me —Where do you think _____ he ____ the TV set?— Sorry,I've no idea.A./,bought B.has,bought C.did,buy D.did bought I’ve already bought two new bikes改为一般疑问句 I`ve got a I've got a I`ve got a they 've bought a new machine for the factory翻译 I bought a book for yes,i was i bought a shcoolbag? Linda,I've bought many ( ).Now let's make the birthday cake.A.fresh eggs B.chocolate milk C.frozen food D.rice dumplings D项为什么不对? have you got another pair of shoes?NO,i've ______ this pair _____just a montA.bought ;about B.kept;since C.borrowed;in D.had;for No.I’ve already bought twenty.That ___ be enough for us two.A.can B.may C.ought to D.might,为什么 21.AREN'T YOU GOING TO BUY __BANANAS?NO,I'VE JUST BOUGHT _.A:SOME;SOME B:ANY; SOMEC:ANY; ANY D:EVERY;SOME I _____ a dictionary.I ____ it in the bookshop.A.have bought;bought B.bought;bought 过去时与现在完成时的区别1)i bought a new computer. i've bought a new computer.2)they stated that they would continue the strike.they have stated that they will continue the strike.3)i told you not to.i've told you not to.4)the action was I've got a headache.