1.The problem __discussed___(discuss) yesterday was very important.
2.The problem __being discussed_(discuss) now is very important.
3.The problem __to be discussed___(discuss) tomorrow is very important.
1.The problem __discussed___(discuss) yesterday was very important.
2.The problem __being discussed_(discuss) now is very important.
3.The problem __to be discussed___(discuss) tomorrow is very important.