—Yes, many times.
—No, it ____ be him. He has ____ Guangzhou and will be back in two days.
—What a shame! We can't play with them. Because they____Nanshan for a school trip.
—He____ Beijing for a meeting and he will be back in a week.
—He____ Singapore and he____ that country for two weeks.
—She ____ Shanghai on business. She will be back soon.
—He____to the school library. And he____there for about one hour.
—yes, I have. I____ Fun Times Amusement park three years ago.