It would be impossible for him to leave hospital tomorrow if he 　　　 first aid when the accident happened.

Where have you been recently?—I ______ in Hangzhou on business for a week last month.[ ]

Where have you been all these years? I have been ___ my village and have ben working in a factory in Zhuhai

Shanghai is one of _______ in the world .

Don’t go to school breakfast.It’s a bad habit.