Look,Jim is working _____ a math problem.
Look,Jim is working _____ a math problem.
The math problem is _____ difficult that only _____ students
This math problem is too difficult _____.A.for me to work it
Where's Mike?He is working _____ physics A in;problem B out;
Look!Peter____ ____ ____(解答)a math problem
英语选择题This math problem is _____ that one.
the math problem is _____ difficult for me ____ solve
The math problem is
the math problem is really difficult I am working it out ()
A Math Problem~FOR
A math-problem
We are all working hard __this math problem?A.in B.at C.with