the problem is too difficult for us to work out中的work out为什么中间不用it什么时候要加itso that?还是别的句子

The problem is _______ he is too tired.A.which B.when C.what D.that the problem is that the businessman is never ( )aware of the risk he is takingA much B very C too D well 为什么选D? he is too wise to slate the problem 翻译 The maths problem is too difficult.math为什么加s The problem is ____easy for me___work out.A.very;to B.enough;to C.so;that D.too;to The problem is ___ to solve.A.enough easy B.so easy C.too easy D.easy enough 英语翻译Every possible means____to work out the problem,but it is too difficult for usa.is used b.are used c.has been used d.have been used The problem is too hard.I haven't ( )the answer A.WORKED ON B.worked for C.worked out D.worked off在括号中填选项 写出同义句 the problem is too difficult for ue to solve.the problem is difficult we can,t solve it.the problem easy for us to solve. The problem is ____ easy for me ___ work out.A.too,to B.engough,to C.so,that D.very,to理由,谢 the maths problem is too different.____ can work it out.A Many students B Few students C A few students D Some students This maths problem is too difficult.___ of the students can work it outA all B both C neither D none The problem is too difficult for me.Can you_____?A.work out B.work out it C.check it D.work it out 为什么 The boy is too fat.I think that is__for him.A.a question B.a problem C.easy D.a good thing The problem is too difficult to solve____my ownA.by B.in C.with D.for答案应该选C,为什么?请说明原因, The problem is too difficult for him ______A.work it out B.to work it out C.to work out D.work out 单选 :( ) none of us could solve the math problem,it is too difficult .A Hardly B Nearly C almost D Seldom请每个选项都解答为什么 , ( ) none of us could solve the math problem,it is too difficultA Hardly B Nearly C almost D Seldom 请每个选项都解答为什么 ,