一个there used to 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?

麻烦大家看这道题There are -----as many houses in this area ther used to be.A two B twice Csecond D secondly为什么选B不选其他呢 The foreigners __there,but they __the food there at first.A used to live ,didn't be used to B are used to living,didn't used to C used to live,weren't used to D used to living,usedn't to 选C 为什么选C be used to do 怎么用?后一个 空 不理 there used to be的意思!RT, 请问 There used to be a park. ______ plenty of water in this river.A.There used to being B.there used to beC.There is used to beingD.There was used to be There ___ a museum here. A.used to B.used to do C.used to have D.used to having There used to be a clean river.为什么不是There used to have a clean river -------- a small book store in thistown.( they used to be ,it used to have ,there used to be ,there used to have) i am used to...1 i am used to travelling by air2 i used to fly there from Europe in holiday.问题请问两句中为什么一个用am 而另一个不用am呢?它们的句型分别是? 英语翻译There used to be a coffee shop next to your house,did't there?其中,used to I used to wear..My hair used to be....I used toI used to wear..My hair used to be....I used to watch...I used to play...I used to be五个句子各造一个句, if you can't got someone out of your head,maybe ther're supposed to be there - 请指教、 请你帮忙,though_is a long way from here ,we'll do our best to reach there in time. a ther There [ ]a river in front of our houseA used to have B was used to C used to be D was used to being There used to be.的反义疑问句是怎么样的? there be加used to 的反义疑问句是什么 There used to be some cities wall.的反义疑问句 there used to be an old ciname here,()/()()?反义疑问句