I can't mend this hole . . . . . . . . any cement.

He is tired . . . . . . . . their complaints.

He always insisted . . . . . . . . his opinion.

Always try to be polite . . . . . . . . others.

Eating fruits and vegetables is good . . . . . . . . health.

I saw you dancing . . . . . . . . party.

The old man walked . . . . . . . . the road slowly. Which preposition is suitable to fill the blank?

The ball fell . . . . . . . . the well.

The mixture was composed . . . . . . . . sand and salt.