I’ll ring you up _______ I get to Beijing.
--- I didn’t see you at the party yesterday. Why? --- Because I ________ for an important person from America at that time.
I hope you __________ in this city for a few more days.
Have you _________ the story before?
We ________ the whole day in Disneyland yesterday.
--- Where is your mother? --- She _______ to Sichuan on business. She has ______ there four times recently.