Please remember to say, "Thank you," and "You're welcome", when….to the host

I'm buying the chocolate donut. ................ one do you want?

.................. Mr. Carter was actually quite sick; he came to the office this morning.

Anna ................... with joy when she saw her brother for the first time in months.

Hey John, ....................... took my book?

Alex: Did you buy all of the course books yesterday? Ben: No, I didn't have ........... money.