This Math problem is very difficult. Mary couldn't work out the ______ (solve)
举一反三
- He couldn't work out the math’s problem ＿＿＿ your help。
- The math problem isn't difficult, and most of the students can work it out ______.
- This math problem isn’t so difficult that I can work it out ________.
- Even the top students in our class can't work out this problem, so it be very difficult.
- I couldn't work out this difficult problem your help. A: under B: without C: for