--- What did Zhai Zhigang do while he was doing “walking” ____? --- He ____ our national flag to the world.
His income is double _____ it was five years ago.
_____ of you comes first will get the ticket.
_____ worries me is _____ we’re going to pay for all this.
I’m afraid we can’t have coffee; there’s _____ left.
The classroom is almost empty, where is _____?