— What do you think of this one?— It looks nice. But I ________ why you choose (选择) this one for me.
—Excuse me, will the plane for Beijing within an hour? —I’m not sure. You can go to the Information Desk for help.
—I’m a little hungry, Mum. —There are some cakes on the plate. You can take _______.
You don’t know ________ I want to see you again. It’s years since I saw you last time.
—Cindy, could you walk a little bit fast? —But how can I? I _________a heavy bag.
—What do you think of __________ idea of taking part in ‘Earth Hour’? —Wonderful! I’ve never heard of __________ one! We can reduce pollution in this way.