They haven’t arrived yet but we _____ them at any moment

It’s easy enough ______ out this problem. You needn’t go to the teacher.

ildren, ________ had played the whole day long,were worn out.

Recent years have______rapid changes ofmy hometown.–Yes, I could hardly recognize it when Iarrived yesterday,

The opening ceremony of the Shanghai Expo brought me back to another exciting scene _____ people rushed about spreading the news of Beijing succeeding in bidding for the 2008 Olympic Games.