–Do you know the boy ___ is standing under the tree?-Yes, he is my friend, Peter.
Lucy met her mother in the park by chance.
Tom helped the teacher to hand out the test papers, didn’t he ?
—Who broke the window?— ______. A strong wind broke it last night.
—I can’t stop smoking, doctor.— For your health, I’m afraid you ______.
-- What about hiking this Sunday?-- Great. I’d like with you.