she had no difficulty _ the problem.A.worked out B.working o

she had no difficulty _ the problem.A.worked out B.working o He had no difficulty working out the problem为什么是working She worked out the _ problem _(easy) He had no difficulty working out the problems.把 working out the problem isn't easy________ A.working out B,to be worked He had no difficulty__the problem.a:working out b:to work ou it is easy for you____.a.to work out the problem b.working o she s() in working out the problem he has no difficulty ---------（work）out the problem . He had worked out the problem when Jim called him No one ___me worked out the math problem. He had some d__ in working out the problem.