The problem is _______ to do next A.that B.what C.when D how

To work out the problem is very hard .(同一句) _____ is very _____ _____ work out the problem . 英语翻译The government is thinking about how to solve the problem of _____ _____? what is the problem The problem is very diffcult.Wecan't work it out.（合并）The problem is ____ difficult for _____ _____ work out.对不起 请问一下为什么？ this is the most difficult problem i have ever handledthis is the most difficult problem i have ever _____ _____（改为同义句） The math problem is too difficult for him to work out.(写出同义句）The math problem is _____ difficult _____ he can't work it out. .用括号内动词的适当形式填空1.The problem _____(discuss) yesterday was very important.2.The problem _____(discuss) now is very important.3.The problem _____(discuss) tomorrow is very important. the key to solve the problem is to _____ treesplant 还是 planting He is so clever that he can solve the math problem quickly同义句He is _____ ______ _____ solve the math problemHe is _____ ______ _____ that he can solve the math problem quickly population is _____ big problem for eities .A.a B.an C.the D./ the math problem is _____ difficult for me ____ solve在变2个同义句 The problem is easy.I think you can do it by _____ He is poor in English,maybe he has some problem _____(点) the dishes 英语这个数学题有点难 the math problem is ____ _____ ＿＿＿difficult This is another way of _____ (work) out the math problem.快 the first problem is ____ _____(了解)why we need to protect animals 是啥 Jenny is so clever that she can work out the problem so quickly.(保持愿意）Jenny is clever _____ ______ work out the problem so quickly. difficult as the problem is