I don’t suppose they could have finished their experiment, they?— , they are still doing it in the lab.

Sally was a bit shy, but we found her quite____ discussing recent singing stars with others.

When the holidays were drawing near, I asked my American friends ___ was the best way to travel in the United States

kind and helpful to the people around us, and we will make the world a nicer place to live in.

He must be helping the old man to water the flowers, _____?[ ]