He _____the problem _____in his mind for a whole week before he did anything about it.

His aunt ________ Beijing and she will staythere for three years.

My family are going on a trip to Qingdao as soon as we _________ the holiday.

__________ great fun it was tovisit the World Expo in Shanghai last year!

What do you think is the most _____ time to find him at home?