The determined boy tried his best to solve the problem,_____
The determined boy tried his best to solve the problem,_____
帮我检查:He tried his best to solve the problem,( )
He tried his best to solve the problem,_______difficult it w
He tried his best to solve the problem __difficult it was 为什
He tried his best to solve the problem,however difficult it
___difficult the problem was,he tried his best to solve it.
He tried his best to solve the problem,______ difficult it w
we had to___ to solve the maths problem A .tried our best B.
we had to___ to solve the maths problem A.tried our best B.t
The little boy tried his best to amuse his mother,only____ t
He tried his best to slove the problem,_A___difficult it was
The doctor tried his best to s____ the boy's life.