We can’t put off _________ a plan.

_ is known to us all is that the theme ofShanghai World Expo is “Better City, Better Life”

What’s one fourth and a half, do you know—Yes, it’s________.

untry’s railway system has launched online ticket-booking and a real-name ticket purchasing system, and _______ requires passengers to provide their ID numbers when buying tickets.

Read the passage ______ which I__________in my talk.