Dear beloved sister @Komall11....

First of all I want 2 tell u that I don't know the exact answer.........so my ans may be wrong..........and I am just trying 2 answer the qustn 2 the best of my knowledge..................And if u r not satisfied by my ans then u can report my ans so that it will be deleted.

Let me try to help u.

2.Single.

3.pages

4.Ability

5.Problems

6.Activities

This ans might help u( But M not sure)

And u plz report this ans if it is inaccurate or not helpful to u.

Thank u 4 such a question based on grammatical concept.