He often o to help me work out the problem.
He often o to help me work out the problem.
it is kind for you to help me work out the maths problem
The problem is difficult for me to work out.
I thought it( ) me to work out the problem.
He is busy to work out the difficult problem. 改错
He found it difficult to work out the problem.
He can work out the problem a(
Without your help,I can't work out the problem He has been a
He can't work out the problem and needs your help 保持原句意思
although he tired his best,he failed to work out the problem
He tired his best to work out the problem and ( ) he finishe
the maths problem is too difficult for me to work out还是to wo