Have you sent thank-you notes to the relatives from _ _ you received gifts

How about your negotiations?—Pretty successful. Full exchanges of opinions allowed both sides of us to better understand ______ each stood on many issues.

Your suggestion is very good ____ theory, but___ practice it will not work.

Excuse me, may I take a seat here—________. The man on the seat has left.

Can you tell me something about my favourite football star David Beckham—Certainly. He has _______ children. Brooklyn Beckham is his _______son.