It is hard for us to imagine____all these advanced technologies will lead us.A、that B、whether C、when D、where

连词成句 is,English,if,us,hard,to,hard,learn,for,it,study,well,easy It is hard of us to learn/of us to learning/for us to to learn/of us learning哪个对,为什么? It is i for us to finish this hard job in suth a short time It is necessary for us to work hard every day 同义句 It is hard for us to live in a______ country.这个空怎么填? this question is very hard.None of us can work it out.(保持原意）this question is ______ hard for ________of us to work out It is hard for us __(exercise)every day It is hard for us __(exercise)every day.why? it is adj of sb to do与it is adj for sb to do区别例题It is hard _______englishAof us to learn Bfor us to learn Cof us learning Dfor us learning It's hard for us to live in a （ ） country Beijing Opera is a symbol of Chinese( ) It is hard for him to think for himselfxie it's+adj.+for sb.to do sth.若for改为to用法!it is adj.to sb.to do sth.是一定存在的,eg:it is helpful to us.it is good to me.it is adj for sb.to do sth.出现更多：it was too hard for me to carry them.请问在什么时候用to,for,这个 It is hard for us to imagine____all these advanced technologies will lead us.A、that B、whether C、when D、where It is hard to It is beneficial to us to read.还是It is beneficial to us for reading. It's hard( )us( )the work on time.A.for,to finish B.for,finishing it is hard for me to give up It is very_____(hard) for you to do that.