the problem isn't easy________ A.working out B,to be worked out C,to work it out D.to work out为什么选D啊,我觉得好像选C啊,为什么不能加it 后面的it就是只待problem咯.后面不用在重复加了?还是为什么.

英语翻译it is a very complicated problem which isn't the side the speaker conveyed. the maths problem isn't very easy and it is difficulta to finishb to finish it ti isn't easy for the child____that age to solve such a difficult problem the proble is different.I can't work it out the problem isn't easy ()for ()to work out The problem is difficult.I can't work it out.（连成一句）The problem isn't ___ ___ ___ ___ to work out. The problem is difficult,I can't work it out.(改同义句) The problem isn't easy —for— —-work out. The problem is too hard for us to work out.(改为同义句)The problem isn't ( ) ( ) for us ( ) work out. the problem is very difficult.we can't work it out.(合并一个句）the problem isn't_ _ __to work out The problem is difficult for me to work out.(保持原句意思）The problem isn't ______ _______ for me to work out. The math problem isn't easy for me to work out (保持原句意思)The math problem is ___ ____ for me to work out The problem is difficult for me to work out.The problem isn't ( ) ( ) for me to work out.同义句转换 You'd be right if you think I avoided the problem by XXX ,but sometimes that just isn't possible. 英语分析句子成分you way to solve the problem isn‘t practicalyou way to solve the problem isn‘t practical 中to solve the problem 作什么成分,practical是表语么?the table can’t moved out of the room by the two of us 中的out of t You can't imagine the difficulty they had [ ] the problem.It isn't [ ] easy.A.to solve; soB.solved; soC.solving; thatD.solved; that为什么? This isn't just the 英语翻译Stop the negative thoughts about yourself.If shyness doesn't keep you -- something you want to do,being shy isn't a very big problem. The problem is very difficult.We can't work it out.(51.合并）1.The problem is ---- ---- --- to work out.(difficult for us)2.The problem isn't ---- ---- ---- --- to work out.(easy enough for us)3.The problem is ---- ---- --- we can't work it out.(s The boy isn’t old enough ________ with the difficult problem by himself.A.deal B.deals C.dealing D.to deal