The Group of 8(G8) _____ the eight richestcountries in the world plays an import part in the international affairs.

How time flies ! We’re leaving school. I’ll never forget the days _____we have spent together.

It is the first time he ________ here and now it is high time that he ________ around

Frank ________ stamps in his spare time. It’s his hobby.

In some countries, people ______ download（下载）music from the Internet without paying, because it’s against the law.