Mary’s ______ sister is four years older than her.

10．–Don’t put the waste on the ground, young man–Oh, I’m sorryI ____ the dustbin there

Heroes are those who，givena choice between doing the right thing at great personal cost or the wrongthing for great personal benefit，＿＿＿＿theformer.

______ is amazing to us is ______some plants can sense the soft touches of the insects on the leaves

At that time, Tom was _____one-year-old baby.