—______is the street crowded with so many people?—Because they are waiting to watch the boat races.
_____ people have died of AIDS (艾滋病) since 1981.
— I think people here are friendly. Do you me?— Yes, I do.
— If my uncle next weekend, we with him.— Sounds great!
— there a number of sheep on the farm last year?— Yes.
Great changes ______ in our hometown in the last ten years.