This problem is difficult,please think it ( )介词
This problem is difficult,please think it ( )介词
It is difficult () out this maths problem
用适当的介词填空.This problem is a bit difficult.Can you explain it
The problem is very difficult .You must think it over ------
this problem is not difficult.you can do it ( ).
I think .difficult to work out the problem.A,it B.this C.tha
___(解决)this problem is more difficult than we think.
I do not think this problem is as difficult as that one 同义句
This problem is more difficult than that one.This problem( )
I think that it is _____ problem for us.a quiet difficult b
The problem is very difficult .You must think about it caref
This maths problem is rather difficult,but it is not _____ t