There used to be lots of trees,_____?
A.weren't there.B.were there.C.didn't there.
这题我问过老师,竟然选A,而我看的资料上是C,用有道翻译一下却又是B也可以,这咋办?
答：
这题会有争议. 一般说来,最佳选项是C.
是的,used to do/be sth.的否定和疑问句式有两种方法：usen't (usedn't) to / didn't use to
Did/ Didn't he use/used to...?和Used/ Usen't he to...?
而there be句型的反意疑问句尾句是：（情态）助动词(n't) there?
按照反意疑问句的规律,选C是一定正确的.
但是,大家在词典上找到there used to be.的反意疑问句例句了吗?There used to be ...需要反意疑问吗?会不会和sb. must have done sth. (yesterday),_____? 的反意疑问尾句一样,要用didn't / hasn'tsb.?不能简单地用mustn't ___? 呢?（其实,根据旺旺英语论坛上的讨论,这mustn't ...? 是正确的,但在中国的考试英语语法中还未被承认）
我们都知道：There must be something wrong, isn't there?(因为这是个there be句型,要将它简化为there is sth. wrong,后加尾句）,所以选A的老师可能是受这个的影响了.

哦,我也找到了词典上的例句了：《牛津高阶英汉双解词典》P1675 ：
1. You used to smoke a pipe, didn't you?
2. There used to be a cinema here, usen(d)'t there?
现在大多数人使用与did连用的形式,特别是口语和不拘谨的书面语中：
3.There used to be a cinema here, didn't there? 从前这里有一家电影院,是不是?
最佳C
因为出考题的人是看过辞典的,好多高考单选题句都是词典上的例句改的!
你后天拿这本词典找到这一页,将例子给你的老师看.