— Is there any possible way to help the children get rid of such a bad habit?

— To be honest, it’s very hard, but we ______on this problem.

-Is there any possible way to help the children get rid of such a bad habit?

-To be honest,it’s verd hard, but we ______on this problem.

A.work　　　　　　 B.worked

C.are working　　 D.were working

— Is there any possible way to help the children get rid of such a bad habit?
— To be honest, it’s very hard, but we ______on this problem

1. A.
   work
2. B.
   worked
3. C.
   are working
4. D.
   were working

— Is there any possible way to help the children get rid of such a bad habit?

   — To be honest, it’s very hard, but we ______on this problem.

   A. work             B. worked           C. are working      D. were working