The problem is difficult,( )he has worked it out.
The problem is difficult,( )he has worked it out.
The problem is difficult,____,he has worked it out.A:though
the problem is very difficult,but he worked it out ____ a la
The problem is difficult ,but he worked it out____.
The problem is very difficult.He can't work it out.(合并为一句)
he has worked out the problem.的被动形式
The difficult math problem he has just put out is ___me.
the math problem is so difficult that he can'twork it out (改
He found it difficult to work out the problem.
He is busy to work out the difficult problem. 改错
The maths problem is difficult,but f___we work it out.
The problem is too difficult .------student can work it out