Who can work out the problem ( ) 5 minutes?

Who can work out the problem ( ) 5 minutes? who can work out the problem ____ five minutes? A.on B.to C. He can work out the problem a( work the problem out “Can she work out the difficult problem?”the teacher said. ( she can work out the maths problem ___(easy) how can I work out the problem _____(easy) else,nobody,our,in,class,work,can,the,out,problem Can you work out the problem in a new w_____ ____,he can not work out the difficult problem 英译汉：“Betty can work out the problem easily." Can you find___ ways to work out the maths problem