---Have you _____been to Beijing?---No, but I want to go there next year.
Jenny was so careless that she______her purse on the bus.
——What if you have two days_______?——I'd like to go_______ a trip_______ Suzhou.
You______buy Tom a present if he invites you to his birthday party.
This umbrella is____that one,but____than that one.
The 6-year-old child is old enough_______ himself.