You never know how much difficulty we had _____ the problem. Luckily, we managed to solve it with Mrs Wu’s help
A.worked out | B.work out |
C.working out | D.to work out |
You never know how much difficulty we had _____ the problem. Luckily, we managed to solve it with Mrs Wu’s help
A.worked out | B.work out |
C.working out | D.to work out |